I'm kinda an all around nerd, so I enjoy the sci-fi/western cosplayers as much as the others. Provided the costume is done well, of course.
As long as I've been going to Otakon, I've seen all sorts of cosplay, so I always figured it was the Otakon way.
There were a TON of Jokers this year. I made it a point to get pictures of as many as possible, including the few in the nurse's outfits.
Also, there were what, 3 Doctor Whos? They made my day.