What was your favorite 'evil' character? How'd you build it? What background did you use? How did you play it? Was in a pyro half-ogre that liked to burn down the town because he liked that extra crispy taste? Just a little cutpurse that robbed arcanum blind? Inquirering minds want to know?
The most fun evil character I had was a persuasive half-elf with the "Sold your soul" background. He was a sorcerer who never attacked directly his enemies, he always used Create Undead or Dominate Will to make his enemies kill themselves.
The stupid but Oh-So-Powerful Half-Ogre destroyer who basically raped the world. Bad endings? I got them all ('cept for the ultimate bad ending, of course). I was compared to Gorgoth a number of times.
A silver tongued negotiator who set out to screw over everyone whilst maintaining appearances as a nice guy. I dominated the wills of Lukan's 2 ogres and used them as bodyguards throughout the game, they did all the fighting that was required.