I would say the best gay categories are:
Amateur
Twink
Hardcore
Hunks
Bear
I would say those are probably the most popular ones.
And I would have to say that General Gay sites DO convert well if you have the right one. The guys that run
Randy Blue have the best converting gay site out there and its a General site. They are also coming out with some new sites here soon
They have gay sites locked down no one else converts like they do period!
-Andy