I like Ian Scott, although I haven't seen much of his stuff in a long while - he's got the luscious uncut piece, sure, but he's very handsome and has a studly bod. French, isn't he? He seems to be getting up there though.
I have a terrible attention span for keeping track of names - I tend to go through random fascination for a while and then forget. I can't really say "the hottest" which is personal taste anyway, so I'll list some favorites. Morgan Black is gorgeous, and is versatile but I prefer to see him getting fucked. One of those college guys sites had somebody who caught my eye, tall and very good-looking - okay checked my recent downloads, Bryan Cavallo, I dug up everything I could find, heh. Tyler Saint seems to have fucked half of the population of the planet on film by now, between the regular porn and the various themed amateur stuff, but he's still fucking hot. Big fan of Colby Keller and Cole Streets - they do a great job bottoming or topping and are just hot to look at. I like seeing big butch Arpad Miklos paired up with little guys. Can't usually go wrong with the random Brazilian guys, although the only one with a name that stood out to me is Marcelo Cabral. Tim Kruger is usually fun to watch, especially with a Latin bottom. Man, I guess I watch more porn than I thought, haha. That's it off the top of my head though.