Fun AK Hand

[Roland19]

How does this look? Villian is 60/2.5/1 over 35 hands. Other than that, no solid reads.
Party Poker 5/10 Hold'em (6 max, 6 handed) converter

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

Flop: (9.40 SB) 3[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets</font>, BB calls, UTG folds.

Turn: (5.70 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

River: (7.70 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls.

Final Pot: 9.70 BB

I bet the flop and turn because he had done nothing to make me believe I didn't have the best hand, and I called the river because I hate being donk-betted and thought it could have been a missed diamond draw bluff. Is this standard, or stupid?

[gaming_mouse]

This guy seems too passive to make this play. I think I'd fold here unless I had a specific read telling me he was capable of this bluff.

[bds]

[ QUOTE ]
This guy seems too passive to make this play. I think I'd fold here unless I had a specific read telling me he was capable of this bluff.

[/ QUOTE ]

Clarify for me please. I thought that a 1% post flop aggression factor on a player who plays 60% of his hands was actually indicated a fairly aggressive postflop player.