Mine would have to be melee fighter. I love getting in close to enemies and bringing them down with close range weapons. It's empowering since the games are so challenging, too, and makes each success feel like a true victory. What's your favorite Dark Souls build (applies to Dark Souls II and hell, even Demon's Souls)?
Also, Lululu, please try to refrain from commenting on Dark Souls. Go play the game first.