[Suzerain of Sheol]

I couldn't even begin to list off my favorite weapons in Borderlands. There are just so many crazy/awesome guns. For practicality, I always liked the Hellfire (submachine gun that shoots incendiary bullets that create clouds of flame) or the Defiler (revolver that shoots acid bullets that eat through armor).

But the wacky guns are just so much fun. Like the Penetrator (full-auto sniper rifle with no recoil) or the Mongol (rocket launcher that shoots multiple rockets that break into even more rockets.)

Oh, also, I have the PS3 version.