the guy is a decent thinking reg , he once ch raise bluffed the river against me... the guy is good ... oppinions ?

strange... I would call I feel AQ is too strong too fold

I have never seen anyone use this line as a bluff.
I would raise flop and get it in.

alright ... seems like a decent option

the thing is, after flatting flop, this is the absolutely best hand you can have on turn. His line looks weak because you can't be very strong, it's just that... I have never seen anyone take this line as a bluff.

ive seen good regs do this since if i flat the flop i cant rly have a very good hand , ive done it myself as a bluff as well ... and for value too but obviously its insanely strong ... and they rarely bluff this indeed

you cant fold here imo vs a good thinking reg.
Either push or call.
problem with calling is you dont like many rivers and he might outplay you.
problem with pushing is that most hands you are ahead are folding...but you protect your hand better on that draw heavy board.

If he is capable of check raise bluffing you on river,he certainly is capable to play his flush or str8 draw or KQ this way.
I mean,on higher stakes this is never a fold and by your comments it looks like villain is more like a higher stakes type of player.