Too Passive with AA on a 99x9x board

[cockandbull]

This sort of thing doesnt happen that often, but hows my line. Too passive or am i correct to fear the red nine?

It's my first hand at the table, so no real reads. I've been waiting to post in the BB and all three of the players that saw the flop seemed loose and somewhat passive.

Party Poker 3/6 Hold'em (10 handed) converter

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG calls, UTG+1 calls, <font color="#CC3333">UTG+2 raises</font>, <font color="#666666">6 folds</font>, <font color="#CC3333">Hero 3-bets</font>, UTG calls, UTG+1 calls, <font color="#CC3333">UTG+2 caps</font>, Hero calls, UTG calls, UTG+1 calls.

Flop: (16.33 SB) 9[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG raises</font>, UTG+1 calls, UTG+2 calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">UTG caps</font>, UTG+1 calls, UTG+2 calls, Hero calls.

Turn: (16.16 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG raises</font>, UTG+1 folds, UTG+2 calls, Hero calls.

River: (22.16 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG bets</font>, UTG+2 calls, Hero calls.

Final Pot: 25.16 BB