Technically I can find all kinds of men attractive if they are decent people. But since you asked, I prefer the whole Boy next door vibe. Young, fit, rather slim, reasonably well dressed, having fun and conscious of the lees needs. Ideally they would try to build some rapport with their lee. Playful teasing, some taunting, figuring out which spots get a cute reaction. Basically a fun, cute, youngish guy who pushes the lee while also ensuring they have fun too.