His short term 38 hand stats were reasonable, though hyperaggro: 21/5.3/7.0

Repping a set at 25NL seems like a stupid idea to me. When you next get in a hand with him, do you just keep hammering away at him?

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($24.75)
BB ($25.85)
UTG ($13.95)
UTG+1 ($5.85)
Hero ($26.95)
MP1 ($21.50)
MP2 ($28.65)
MP3 ($6.25)
CO ($24.90)
Button ($23.40)

Preflop: Hero is UTG+2 with T, T. SB posts a blind of $0.10.
1 fold, UTG+1 calls $0.25, Hero raises to $1.25, MP1 calls $1.25, 6 folds, UTG+1 folds.

Flop: ($3.10) 4, T, 3 (2 players)
Hero bets $1.75, MP1 raises to $5.5, Hero raises to $9.25, MP1 calls $14.75 (All-In), Hero calls $11.

Turn: ($43.60) 5 (2 players, 1 all-in)

River: ($43.60) 8 (2 players, 1 all-in)

Final Pot: $43.60

Results in white below:
Hero has Tc Td (three of a kind, tens).
MP1 has 2h 2c (one pair, twos).
Outcome: Hero wins $43.60.