100NL 6m AA river decision

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($179.45)
Button ($72.40)
Hero ($99)
BB ($168.30)
UTG ($99.90)

Preflop: Hero is SB with Ahttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Ahttp://www.flopturnriver.com/phpBB2/...miles/club.gif.
1 fold, MP calls $1, 1 fold, Hero raises to $4.5, BB calls $3.50, MP calls $3.50.

Flop: ($13.50) 8http://www.flopturnriver.com/phpBB2/...iles/heart.gif, 9http://www.flopturnriver.com/phpBB2/...miles/club.gif, 8http://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players)
Hero bets $11, BB folds, MP calls $11.

Turn: ($35.50) Thttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
Hero bets $22, MP calls $22.

River: ($79.50) 6http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
Hero ???

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Villian is 55/2.4/0.60 over ~30 hands. No strong reads otherwise, I don't think I've seen him continue with a hand past the flop.

What's your play here on the river? What else could have been improved about this hand?

personally, i see the .6 AF. and i bet smallish again. somewhere around $30. i doubt he would have called the flop bet on a backdoor str8 draw. maybe a busted flush...he will fold. maybe and 8...he will raise. maybe a 9/T, he will call. if he raises, get out, depending on the size of said raise. i hope with an unpaired 7, he would have folded on the flop, but you never know with passives.

i would give the opportunity to raise my bet, but make the bet look like i am begging for a caller. if you bet 3/4 or ps, and he calls, i think you lose.

probably has a 9.

I check/call any reasonable bet because value is too thin. if he bets hard i fold.

I like betting 25-30, think ur ahead of his range here and he's not betting much of it, and it's a super easy fold to any raise.

otherwise I raise to 5-7 preflop (whatever can get away with vs this guy, when he's seein lots of flops but folding when he doesnt hit substantially), bet pot on the flop, and maybe 1/2 on the turn but 2/3 seems ok too.