If you don't already understand, nothing we can tell you will make you understand.

I play with whatever the characters morals are. I'll probably play the DB questline when I make a character that looks like Kefka, then I'll get a set of Jester's Clothes and become the next Mehrunes Dagon.

On a side note, I always find it difficult to play evil characters because I always feel guilty. Frankly, I sometimes think that people who don't care about morals when they're playing such open-ended games to be a little unrestrained in their actions in the real world. The only thing that's really stopping people like this is fear of punishment and real life consequences. In total anarchy, I'd put my money on these people becoming equivalent to Fallout raiders.