I'm pretty much in Crothian's boat. I don't like playing in evil games often, but I'm pretty good at it. I can do creepy/gross/whatever, but it's really the normalcy of the evil that's creepy.
On a related note, I did freak my wife out, once. She was playing a V:tM character and burning through Humanity at an obcene rate (from 8 to 2 within a dozen sessions). She was flirting with the Sabbat and/or alternate paths. Her encounter with a Tzimisce was an instant call to sanity. Vicissitude + small children. Enough said.