Personally, I've never cared for conventional standards of attractiveness. I don't see the women that are used on the front of magazine covers as necessarily sexy. I don't see Mila Kunis and Miley Cyrus and really see what's so appealing about them. I don't see the slim and pretty image as stimulating in any way.
Looks wise - It really gets me interested in a woman if she is dark. Gothic clothing, dark complexion around the eyes. I prefer shorter women, but it's not that important.
Besides that, I don't really care much for looks.
What turns me on most about a person is their desire. The way they act. The sense of sexuality that surrounds them. People who act certain ways are 10x more likely to get me interested in them than people who are simply physically attractive. Behaviour is more stimulating to me than physical appearance.
I think this is why I'm completely open to having sex with shemales and some males. I probably couldn't fuck a big masculine dude, but I've been tempted to fuck guys that are quite short, feminine and sexual.
What are you guys into?