Drake, my Fighter/Rogue, is a Neutral Evil character who just made all the wrong choices and got the crappy end of the stick all the way through his youth.
Even so, he has a personality, he has thoughts, some limited morals, feelings. Evil doesn't mean you have to discard all character depth - Bad guys still have friends.
But on the subject, if you want to fall in line with his goals or make a character that would have a predeliction to do so, and feel like part of some evil drive, you're more than welcome to help kickstart things =P