The Lucky 13
Many users on the site have a version of this list, and this version is my version.
Sometimes when you're playing a game, you come across a character that is cool enough to make you say, "Damn, if that dude / lady were real, I would totally buy him / her a drink if I ran into them at a bar." Other times, that character is such an unbelievable badass that if some gangster shit started to go down at said bar, you would want them to have your back. These are the characters I want backing me up in the case of any sort of catastrophic event.
Honorable mention: Georges St. Pierre. He's a real person and therefore can't be on this list, but that kind of makes him even more badass. Also, Jetfire because he is a giant robot, and while that would be useful at times, you can't just hang out with a giant robot, despite what Michael Bay wants you to believe.