oh boy...
I'm gonna have to agree with the smell factor.
Just thinking about the way my SO smells gets me going. Giving oral sex while my SO is driving is something I'd like to try still. Definitely a turn on.
As for fetishes... I'm thinking a nice suit, eyeglasses, and start talking about something I know nothing about. Intelligence sets off my want to pounce. Rawr. HAHA.