Paizuri's OK for me, though I could think of so much more to do with breasts. I'd rather watch or read about it. Reading/watching hentai for so long makes me expect really smooth/slippery/wet/oily boobjobs, and unless there's a lot of lube or oil involved in reality, that's not happening often.
Second position Prinny mentioned would have to be my favourite, since I'm mostly dominant sexually. Also, I prefer singles.
I'll leave you guys with a new question for now, inspired by some users I've talked to:
What are your thoughts on extensive nipple and breast foreplay? If a girl you're having sex with claims to be able to orgasm from just that, would you enjoy playing this way with her more?
I'll answer this when I wake up. It's past 3, and I need my sleep.