[jjb108]

Fold is OK here. Make some notes. If he's getting out of line with junk or draws later on, you'll know and you can push instead of fold and stack him.

You should be watching the table for an orbit or 4 before sitting...then you'll know fold or push.

Edit - to answer your question. AJ, set, naked flush draw, or pair and a flush draw. Really need a read to guess.