Weak top pair. Good bet on the turn?

Is this a good bet on the turn or just a chip-spew?

$50 NL Texas Hold'em (Real Money)
Total number of players : 10
Seat 1 $192.64 ) Seat 2 $67.60 )
Seat 3: BUTTON ( $9 )
Seat 4: SB ( $29 )
Seat 5: Hero (BB) ( $50 )
Seat 6 $56.25 ) Seat 7 $52.35 ) Seat 8 $62.40 )
Seat 9: Villain ( $64.40 )
Seat 10 $79.80 )

SB posts [$0.25].
Hero posts [$0.50].

Seat 6 folds. Seat 7 folds. Seat 8 folds.
Villain calls [$0.50].
Seat 10 folds. Seat 1 folds. Seat 2 folds
BUTTON [$0.50].
SB calls [$0.25].
Hero checks [6d Qc].

** Dealing Flop ** [ 4d, 9s, Qd ]
SB checks.

This is start of my second orbit at the table so not too confident about my reads: So far though villain and BUTTON both seem loose and overly aggressive on the flop. If I lead out I think it’s likely that I will get at least one call and still have no idea where I am. If I check I think that either villain or BUTTON might well bet any two cards. I check.

Hero checks.
Villan bets [$1].
BUTTON folds.
SB folds.
Hero calls [$1].

What do you think of this call? My feeling is that I am often ahead here but a better Q is a real possibility. Would a raise be better? If yes why?

** Dealing Turn ** [ Ad ]

I picked up a crappy flush draw. The flush-card ace might look scary to another Q and I might be ahead anyway. So I decide to lead out 3/4 pot.

Hero [$3].

What do you think of this bet in this spot? Results to follow if I get any replies.