I may have already mentioned my tattooed Russian felon thing, so I'll spare you...
But another one I like is that I am a young man, very beautiful and effeminate, living with an older guy who teaches me all about sex with guys. He is firm, but gentle. When he makes love to me, he takes what he wants, but also makes sure that I enjoy it as well.
Or, I'd live in a big house with lot's of young beauties, (in this one I am an older woman, which I actually am.) My "boys" would be affectionate and loving with each other, and lie about the house like cats, making out and fondling each other until I can't take it anymore, then I'd go off with, yes, the tattooed Russian and get my ya-ya's. In this fantasy I don't actually touch the boys myself, they are strictly with each other, it's just the image of them together all hot and sexual, that does it...
Sometimes I am the older guy, making love to the little 'twinkies', but never hurting them, just getting them all turned on and seeing the 'eyes half-closed', mouth open, that lovely soft look they get when they are really aroused.
Why do so many fantasies I have involve me being a gay guy? Maybe I was one in a previous life...

Anyway, I think I'd make a great gay guy...