What did I do right and wrong here?

Villian is a well-known multitabling rock at 10-20 and 15-30. 12.5/7.8 over 470 hands.

1.53 overall AF, but it jumps to 2.33 on the river (though I did not have this infomation at hand when I played the hand, I only knew he was a rock with a 12.5% VPIP).

Edit: He respects my play, so his range of 3-bet hands is limited here. Something like AQs/AJs was not even a possibility, imho.

Party Poker 10/20 Hold'em (9 max, 9 handed) converter

Preflop: Hero is UTG+1 with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">MP3 3-bets</font>, <font color="#666666">4 folds</font>, Hero calls.

Flop: (7.50 SB) 4[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP3 bets</font>, Hero calls.

Turn: (4.75 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP3 bets</font>, <font color="#CC3333">Hero raises</font>, MP3 calls.

River: (8.75 BB) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP3 raises</font>, Hero calls.

Final Pot: 12.75 BB