I think it's harder these days to find a masculine bottom. In the past I don't recall having a lot of trouble. Even though many said in the bar that they were top only, back in the room many became more...adventurous, shall we say.
These days I'm versatile so it doesn't really matter all that much. All of my regulars are top only so there is no way they could ever be my "boyfriend".
I still consider myself basically a top, so any bf naterial would have to be versatile.