Villain is 19.4/10.5/3.2/450 hands. I just sat down but caught that he was complaining about no action on his big hands just before this was dealt.

Is this always a fold pre-flop against an unkown? If I call this flop bet I am probably committed so what is my action?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
Hero: $100
UTG+1: $183.20
CO: $115.90
Button: $194.15
SB: $36.25
BB: $19

Pre-flop: (6 players) Hero is UTG with
Hero raises to $3.5, UTG+1 raises to $12, 4 folds, Hero calls.

Flop: ($25.5, 2 players)
Hero checks, UTG+1 bets $25.5, Hero ?

Since it's 6 handed we can assume his re-raising standards are a little more loose. Hands you beat 77/88/99/AK/AQ. Hands that beat you JJ/QQ/KK/AA/66/55?

I'm not sure how often 55-77 reraises preflop at this level but I thought I'd include it in their range anyway. He bet the pot on the flop which makes me kind of think hes scared. I flat call and see what he does on the turn, his flop pot bet makes me think AQ/AK.

Call and reevaluate the situation on the turn. If he slows down your obv ahead and if he fires another bullet you may need to use the time bank.