Flop TPTK, hows my line?

[JReezy]

I have an aggressive image at table, villain is 19/15/2.5 over 100 hands. I have 120bb villain covers. It would be an easy fold if not for my image. Also, I should be betting flop right?

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Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter (http://www.neildewhurst.com/hand-converter)

Pre-flop: (6 players) Hero is UTG+1 with A/images/graemlins/spade.gif K/images/graemlins/spade.gif
UTG calls, <font color="#cc0000">Hero raises to $5</font>, CO folds, Button calls, SB calls, BB calls, UTG calls.

Flop: A/images/graemlins/diamond.gif 3/images/graemlins/heart.gif Q/images/graemlins/club.gif ($25, 5 players)
SB checks, BB checks, UTG checks, <font color="#cc0000">Hero bets $18</font>, Button folds, <font color="#cc0000">SB raises to $50</font>, 2 folds, Hero folds.
Uncalled bets: $32 returned to SB.

Results:
Final pot: $61

[Osprey]

He ain't doing that with A-J... seems fine as played.

[Abramovic]

Good

[Praetor]

this is ok I guess but I might stack off

[beardedwhale]

Looking at the post, it seems like a fold. But there's no way I'd fold that flop in the heat of battle. Maybe to a decent turn bet unimproved.