Generally speaking, the truly evil people of the world prolly don't plunk their arses down in front of te computer to unwind with a little rpg action or so.
I hope you aren't one of those people who cried foul when they read, in a certain Underdark novel, that dark elves dance, sing, and fish. And grow cattle. The cries were something along this line -- "Drow plot, murder, torture, in-fight and have wild sinful sex 24/7!"
Folk, evil people have to find entertainment somewhere, too.
Just because you are evil doesn't mean you have to be plotting world domination
all day/night long. Realistic villains could be anything from art connoisseur, rare book dealer, to, well, a CRPG nerd.
If evil were to win then it would be a bit demoralizing to say the least.
It's interesting to note that many evil overlords intend to "rule wisely and make the land unassailable" rather than "rule with iron-clad fists and tyranny". Heh.
