Yes, I really like it. I'm generally a strong guy and have to make many important decisions on a daily basis, so being fucked and being a bottom for me might be like being submissive in weird sort of way, like, being dominated to an extent. May be this reasoning is just rubish, because of course I do it for the pleasure.
The thing is that some times when I get fucked by really big guys it can be more painful than pleasurable, so that's why I think it might be to do with the submission stuff.
Having said that, I don't bottom for small guys. It just doesn't do anything for me.