Favorite video game villian.

[EmeraldSkye]

Mehrunes Dagon, the Daedra Lord from both The Elder Scrolls Legends: Battlespire and The Elder Scrolls IV: Oblivion. That guy just won't give up! His sword's pretty cool, too...if you can find it. And his final giant-sized confrontation with Martin Septim--the last of Tamriel's Imperial bloodline--is truly the meat and drink of epics.

Aribeth from Neverwinter Nights is up there, too. I feel bad for her, watching her spiral down from holy paladin to traitorous and unholy blackguard, all because her lover was unjustly killed for the sake of "mob justice". Even my bloodthirsty Lawful Evil character had to let her live after she yielded in combat. Definitely a tragic villain. :|