Mordecai with pretty much any sniper or revolver themed build is killer, but I don't mind playing as Roland with a support gunner loadout (ie ammo regen, ridiculously large clip size, maybe a shotgun or light launcher for a 'sidearm'), or even the explosive powerhouse of Brick, with a grenade/launcher/shotgun focus. Lilith, on the other hand, sucks in my opinion, as SMG proficiency rarely lends itself to the open zones of the game, and a little rat-a-tat SMG action on a Badass enemy isn't anywhere near as cool as a large bore headshot. That, and her special ability was kinda crap.