Wolverine, also called Logan, is the best at what he does. Problem is, what he does isn't very nice.
Background
Logan aka James Howlett, has been alive for well over a century. From a scared and tormented origins after his parents death (causing his mutation to appear), which he had long forgotten, to living wildly with wolves. Logan joined the military and served for many years which include both world wars. He got involved in the Weapon X project in Canada, which changed him forever by adding adamantium alloy to his bones to try and use him as a weapon. Logan ended up going feral and killed almost everyone at the facility before escaping again into the wilds. Since then, he's traveled around the world, been involved in more militia groups, and even joined Alpha Flight, before joining the X-Men.
Personality
Logan is both a very simple and a very complex man. At the heart of things, he's a good guy and wants to help others by doing good. Many know him to be dependable, loyal, and a wall on which to lean on for support. Some members of the X-Men would even consider him to be the binding agent of the team - although some would disagree as he tends to be independent and reckless at times on missions. Logan adheres to a code of conduct that is akin to Japanese Bushido beliefs: Where honor, loyalty, self-sacrifice, and duty are empathized virtues.
On the darker side, he is also what you could consider to be primal. There is a delicate balance of power between man and beast within him. Also, despite the fact that he lives at the mansion most of the time, and is surrounded by people often, Logan is a loner. He tends to stick things out by himself and rely upon his self more than others, often picking up and drifting off on his own, if the time calls for it. The worst aspect to the darkest part of his psyche is that monster that lurks within himself. It often rears it's ugly head when he's pushed to the brink of breaking and cannot recover. This side is nothing short of a feral rage which clouds his judgement and morality, only knowing pain. Logan tries his hardest to keep this side controlled and away from people, but it doesn't always work.
Powers
Some of Logan's powers are from his natural mutation, but some have been altered through the Weapon X program. Naturally, he is a mutant with a healing factor and heightened senses. He is able to recover from physical traumas that would injure him and even possibly cause death. This also goes for certain toxins that he's encountered in the past. Small nicks and wounds can be fully mended within minutes, while other more severe and brutal wounds can take weeks or months for his body to heal and regenerate through. When it comes to his senses, his sense of hearing and scent have been enhanced. While his eyes are sharp, it's nothing like a telescoping sight or as significant as his hearing and smelling are. He's able to hear sounds from miles away, the fainter ones having a shorter range than louder sounds. His scent of smell also ranged for a few miles. To a degree it's like a bloodhound with the ability to discern certain natural scents that are attached to people, as well as being able to identify the scents of things at a longer range than normal. While berserker rages have been attributed to normal humans, Logan's is particularly brutal and nearsighted if he's pushed to that brink. It's the animal within him being unleashed, which laways lurks in the back of his mind.
Logan did have claws of bone once, but after the Weapon X project, they've been altered and bonded to adamantium, one of the strongest metals known. He's able to easily cut through things such as titanium. The claws are now one foot long each and are shaped to deadly blades, which slide up into holders within his forearms. His skeleton has also been bonded to the metal, making him feel more like a brick wall than a normal person, especially in fights, due to the density of the metal and the muscle mass required to carry it. His movements have more power to them, such as his punches in a brawl. It also makes it almost impossible for him to be able to break any bones.
Skills
Many of Logan's skills come from years of military training. This includes his tactics, stealth, and weaponry knowledge and use. He has handled many weapons, from simple pistols, to large machine guns and state of the art various other types of technological weaponry. When not using weapons, melee combat is Logan's fighting style of choice. He knows various forms of martial arts and other fighting techniques - both from miliatary and traveling influences. But, he prefers to use his claws for combat. The man is able to speak a multitude of languages, which include: English, Spanish, Japanese, Chinese, French, and Russian. This has aided him immensely in both military operations and in his world travels. Some of his skills have come naturally such as his survival skills - being able to live off of the wilderness effectively, his streetwise sense and awareness in many different situations, that naturally intimidating look and awareness of his, and his tracking abilities - which can be attributed to his heightened senses.
Boons
While Logan doesn't have many boons to count, they still come in pretty damned handy when needed. As a member of the X-Men, Logan not only has access to the team when he needs them, but also their resources and technology. Communicators, and other gadgets that are available to him - not to forget the uniform. He has access to areas such as the Danger Room, and War Room, should the need arise to use it. Being that he used to be in the military for many years, he's gained a number of contacts along the way that help him with various things, like intel, when they're needed. Some of these contacts are even people from the streets in various parts of the country that he's aided throughout the years. And finally, that motorcyle of his, a 1980 Harley Davidson FXWG Wide Glide. It can reach up to 67 horse-power and 5800 RPM, maxing out at a top speed of 101 mph. This is Logan's baby, and he's traveled near the ends of the earth on it.
Flaws
Logan's flaws are significant. On the physical aspect, while it may be great to have metal laced in with your bones, the drawbacks are quite significant. His weight now sits at around 300lbs, which is far more than his body should be. This weight is noted with certain cheaply crafted furniture as it creaks and groans beneath him. Also, due to his density, swimming causes more strain on him to stay afloat, or sink like a heavy stone. He is able to swim at distances, but it fatigues him more quickly than someone else. Other aspects, such as electricity and magnetism hurt him with more intensity than others. Since adamantium conducts electricity, one zap can linger in his system, causing more pain. Adamantium is also magnetic in nature, so magnetic rays hurt and put a strain upon his bones when he's near. This is also why he cannot go through metal detectors.
Aside for the horrors of metal bonded bones, Logan's heightened senses have drawbacks too. Intense smells, sights, and sounds, can easily disable him if they're too much for him to handle. Innate in his nature, Logan is prone to rages. While in these moments, it's hard to reason with the man, if at all, and he tends to hurt and destroy almost anything around him, which can include friends if they're not careful. This usually happens when pushed too far. Due to his rages and others aspects of his personality and history, Logan is a loner. He tends to himself, and when shit hits the fan, he'd rather run and deal with the issue on his own than ask for help from friends. After the Weapon X incident, which left his memory shaky with many blank spots, he's had intense nightmares every now and then - night terrors that creep up on him when he's trying to sleep. And finally, his healing factor has slowed his aging tremendously. To a degree, it hinders him seeking out any long term personal relationships with others, because he'll see them die before he's ever long gone, and knows this. His healing factor also inhibits his ability to get inebriated, which means he'll have to drink at least double the normal amount of alcohol for a man of his body type, to get drunk.