[Closed] NL 25 AJs, 6max deep, 3bet pot OOP HU

How aggressive is this opponent?

The way you played it on the river villain might think you are trying a blocker bet with a Qx hand or perhaps a missed draw (although he could beat them) and decide to bluff you. If villain is not overly aggressive that this point is a bit mute.

His raise size is a bit on the bigger side as well.

Since you have 150 hands on him and he 3bet quite a bit have you seen any of the hands he 3-bet with or perhaps a bet size tell? His preflop 3bet is very small.

pf is fine, can´t really b/f against aggressive 3-bettor.
Since you have a lot of equity against anything and most important you get AK to fold I´d prefer c/r flop and playing for stacks
Once you c/c then turn I like c/c, although against with your equity you can c/r. but since likely he won´t fold there better hands, I think c/c down is fine. You can donklead river, but then you also have to call shove, since he can shove the missed draws, but also very fine line would be just c/c to let him fire 3rd barrel his air