Live $6-$12 game typical passive game

Hero is in C/O with A 2 5 7 (suited diamonds)

Preflop
UTG calls, MP calls, Hero calls , Button calls, sb calls, BB checks.

Flop
A 3 4 (2 hearts)

SB checks, BB checks, UTG bets, MP calls, Hero calls , Button calls, SB folds, BB folds.

Turn
10 (offsuit)

UTG bets, MP calls, Hero raises

What do you guys think? Should I have raised the flop, or is waiting to the turn better?

Raise pre-flop btw.

The advatage of raising the flop is to get rid of the baby flushes and make hands like A26xs pay the max to draw out. You don't mind isolating against the bettor as you have the redraws - but you only have one bet in the pot.

On-line this would be table dependent for me. Live, I would always raise and expect to get at least 2 callers ;-)

I REALLY like waiting till the turn since you have position on this hand. If you raise the flop and get a 2 callers, you will have the turn checked to you and will have made less money assuming all other things are equal and you scoop.