AdAh9d2s, preflop 3-way shove

[DrewOnTilt]

How's my preflop raising here? This is my first real foray into big-bet poker, and I think I have been raising too big preflop since I tend to pot it with hands like AA-wheel-x, and everybody folds.

Table was loose passive. Everyone loves to limp but a preflop pot raise gets only 1 caller or so.

How is my EP minraise here? Is this what I want to do at this type of table, or should I raise it more? My understanding is that with the hand that I hold and the looseness of the table, my focus should be on building the pot.

Stacks:
Me: $21.85
Caller: $22.24
Button: $13.75

I'm UTG + 2 with A [img]/images/graemlins/diamond.gif[/img]A [img]/images/graemlins/heart.gif[/img]9 [img]/images/graemlins/diamond.gif[/img]2 [img]/images/graemlins/spade.gif[/img]
1 limper
I minraise to $0.50
2 callers
Button reraises to $0.75
I pot to $4.35
1 fold, 1 call, Button makes it $7.95 to go.
I shove allin.