Battle of blinds

Battle of Blinds – I have raised Villain multiple times from SB & Button. He is starting to play back at me occasionally. I already stacked him once with KK over his TT, though not during a blinds hand. Villain is 29/6/1.6

Hold'em NL ($0.25/$0.50)
Seat 5 is the button.
Seat 1: Peter21 ($15.70 in chips)
Seat 2: Timmiey sits out
Seat 3: KindaTilt ($54.20 in chips)
Seat 4: gbmunkey ($57.55 in chips)
Seat 5 (Button): HERO ($78.15 in chips)
Seat 6: kaukaba ($34.15 in chips)
kaukaba: posts small blind $0.25
Peter21: posts big blind $0.50
----- HOLE CARDS -----
dealt to HERO [Qh Ah]
KindaTilt: folds
gbmunkey: folds
HERO: raises to $2
kaukaba: calls $1.75
Peter21: folds
----- FLOP ----- [Ad 9h 9c]
kaukaba: checks
HERO: bets $4
kaukaba: calls $4
----- TURN ----- [Ad 9h 9c][2s]
kaukaba: checks
HERO: checks Would you bet again here?
----- RIVER ----- [Ad 9h 9c 2s][2c]
kaukaba: bets $5.50
HERO: calls $5.50 River call OK with double paired board?

----- SHOW DOWN -----
kaukaba: shows [8d 9d] (A Full House, Nines full of Twos)
HERO: mucks hand [Qh Ah]
kaukaba collects $22.35 from Main pot

Turn check is fine, induces bluffs and a way ahead / way behind situation. Hard to imagine you getting a bunch more value from a worse hand besides a bluff. River call is very standard. You check the turn and showed weakness, not to mention he could be value betting a worse ace. He didn't even make a real bet, you're getting like 3.5-1 and you're easily good that much. His bet looks so weak I almost want to raise for value (and would against some players who lead the river like that with AK/AQ). You definitely are at least calling the river, folding is not even an option.

Any lost value on the turn from a weaker A? That is what I thought he had, with an outside chance of a 9.
I figure the 9 raises my turn bet and I drop the hand, or is that too exploitable at my level?