Motherless has always been one of those sites that people love but are seldom willing to admit to. The community has a bit of a bad rap and they've been caught up in some dodgy stuff in the past - that said, I think it's safe to say that when it comes to finding hot amateur content, this place is one of the better destinations on the Internet.
If you search for 'amateur gay', you'll find that the archive presently has just under 5,000 scenes that are returned as positive hits for those keywords. What's more, it appears as if there is very little straight material here or sissy clips - a common problem that other user-uploaded content communities can come across.
Motherless has a few content groups that are devoted to amateur gay porn too, so I recommend you check them out if you want to get on board with a bunch of people that are interested in the same X-rated material you are.