2 hands I'm unsure of

Both are $5.50s

Hand 1:

The last few hands have given me an aggro image

Hero 2085
Big Stack 2550
Button 1670
SB 2085
Villain in BB 1610

Blinds (50/100)
Hero is UTG with A[img]/images/graemlins/diamond.gif[/img]Q[img]/images/graemlins/spade.gif[/img]
Hero raises to 400 (my standard raise here is to 300)
Folds to Villain
Villain calls

Pot = 850
Flop 2[img]/images/graemlins/spade.gif[/img]9[img]/images/graemlins/spade.gif[/img]3[img]/images/graemlins/spade.gif[/img]

Villain checks
Hero bets 400
Villain calls

Pot = 1650
Turn: 7[img]/images/graemlins/spade.gif[/img]

Villain checks
Hero checks

Pot = 1650
River: 2[img]/images/graemlins/diamond.gif[/img]

Villain bets 400
Hero calls

Hand 2:

UTG 2530
Hero 2880
Button 1750
SB 2490
BB Shorty 350

Blinds (50/100)

Hero is MP with Q[img]/images/graemlins/heart.gif[/img]T[img]/images/graemlins/club.gif[/img]

UTG folds
Hero raises to 400 (can't raise to 350 on Bodog)

Hand #2 is a new play for me, and I'd like to hear anyone's thoughts on the play in general. Hand #1 was just frustrating. I don't know how to play with roughly even stacks on the bubble with low blinds.