No real read on Villian - haven't been at the table very long. He hasn't done anything overly stupid from my short observation - not a regular at my game.

Ultimate Bet No-Limit Hold'em, $.25 BB (10 handed) from (Format: FlopTurnRiver)

saw flop|saw showdown

UTG ($35.25)
UTG+1 ($26.15)
UTG+2 ($13.25)
MP1 ($14.40)
MP2 ($9.60)
MP3 ($10.80)
CO ($10.30)
Hero ($25)
SB ($27.40)
BB ($34)

Preflop: Hero is Button with A, K.
UTG+1 calls $0.25, 3 folds, MP3 calls $0.25, 1 fold, Hero raises to $1.5, 1 fold, BB calls $1.25, 1 fold, MP3 folds.

Flop: ($3.60) 4, A, A (2 players)
BB checks, Hero bets $3, BB calls $3.

Turn: ($9.60) 5 (2 players)
BB checks, Hero bets $6, BB calls $6.

River: ($21.60) T (2 players)
BB bets $16, Hero folds.

Final Pot: $37.60

Originally, I had him on an AQ/AJ type hand. After the hand played out, however, and he fired full stack at the river, visions of full houses ran through my head, not to mention that the diamond flush got there to boot. Do you like my laydown here, or should I have gone with my first instinct and called, expecting to see weaker trips getting a bit more than 2:1?

The spade draw missed. Bet more on flop, turn

You played this hand perfectly until the river.
The fold looks really bad, this is so often any A.

Agreed, you have to call that river bet.

No way do I fold there. I suspect I might lose one time in 3 or 4, but mostly I win.