.01/.02NL, AA looks good, but then get weird

[PotatoStew]

The villian here is very loose - has hit some lucky hands and showed down some pretty crappy hole cards. Haven't seen any outright bluffs from him yet. I think I played this right, but would like to know if that's the case.

PokerStars No-Limit Hold'em, $0.02 BB (6 handed) Hand History Converter Tool (http://poker-tools.flopturnriver.com/Hand-Converter.php) from FlopTurnRiver.com (http://www.flopturnriver.com) (Format: 2+2 Forums)

CO ($5.15)
Button ($2.83)
SB ($4.79)
Hero ($2.74)
UTG ($4.55)
MP ($6.29)

Preflop: Hero is BB with A/images/graemlins/club.gif, A/images/graemlins/heart.gif.
<font color="#666666">1 fold</font>, MP calls $0.02, <font color="#666666">1 fold</font>, Button calls $0.02, SB completes, <font color="#CC3333">Hero raises to $0.12</font>, MP calls $0.10, Button calls $0.10, SB calls $0.10.

Flop: ($0.48) J/images/graemlins/spade.gif, 4/images/graemlins/heart.gif, 4/images/graemlins/spade.gif <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets $0.2</font>, MP folds, Button folds, SB calls $0.20.

Turn: ($0.88) 9/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $0.3</font>, SB calls $0.30.

River: ($1.48) 3/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $1</font>, Hero calls $1.

Final Pot: $3.48

[Gravy]

Hey,

preflop's good. Flop bet is way to small with a paired board + FD + 3 other players. $.40-$.48 is the way to go here. Rest of the hand plays differently after that.

[Vern]

Raise that flop a PSB($0.48), take the turn for about 3/4PSB ($0.66 as played) As played, call the river.

[Sir Winalot]

Pot flop, pot turn.

[PotatoStew]

Ok, so bigger bets all around post flop. How dependent is this on the number of people in the hand - if I'm heads up, are smaller bets ok (ie, just big enough to avoid giving odds on draws)?