Three characters... hmmm... lets see. So all of my three goes as following, either which ones as a female I have the hots for, or which one would kick ass.
Fawks from Fallout 3. Simply because HE NEVER CAN DIE!!!! Never will, never can, and never does he run out of ammo, I mean come on! Who can freaking beat that! Also I never get tired of hearing after all his perfect ways of pronouncing words without lips, and his charasmatic personality of hearing: TO FUN! Cracks me up. 'Sides, he takes all my kills on that game, might as well let him take out all of the zombies.
Captain Price, because his gentlemanly way of maintaining a mustache is badass.
Soap Mactavish, but that's for my greedy twenty-year old needs all because of that sexy as hell Scottish accent, stubble, and his mohawk. 'Sides with Fawks everything would be dead before you could as much thumb off safety from your rifle or pistol.