I guess I should also note that I think whether or not the performers are into it makes a huge difference for me. Some leather/s&m type stuff where the guys seem to be really, really into it is hot to me, but twinks looking bored, not so much.

The same goes for solo, if the guy looks extremely bored, or self worshipping, I am not that into the pics. If he looks happy, or thoughtful, or like he is just enjoying life, it creates a completely different atmosphere in the set. When dealing with solo, a balance between artistic value and sexual value is priceless. I can go over to about any straight friends house and watch him daftly rub himself in his underwear on his couch for hours.