villain is running like 25/12/1.5 over 50. Looks standard but I've been running badly so I need a check-up.

Full Tilt Poker $0.10/$0.25 No Limit Hold'em - 6 players
The Official DeucesCracked.com Hand History Converter

Hero (BB): $27.15
UTG: $26.00
MP: $27.45
CO: $37.65
BTN: $25.80
SB: $25.00

Pre Flop: ($0.35) Hero is BB with K A
4 folds, SB raises to $1, Hero raises to $3, SB calls $2

Flop: ($6.00) 6 6 T (2 players)
SB checks, Hero checks

Turn: ($6.00) A (2 players)
SB checks, Hero bets $4.25, SB calls $4.25

River: ($14.50) J (2 players)
SB bets $17.75 all in, Hero folds

I bet this flop when checked to.

As played, I bet $4-$4.5 on turn. Rest looks standard.

I'd bet the flop after 3-betting preflop. It happens to make the rest of this hand easy to play.

+1

not only that, but betting 5-6 on the flop can allow you to ship the turn should you choose to

not betting this flop changes the whole complection of the hand. not betting this flop after you 3 bet is a leak imo. otherwise you may as well not 3 bet and just c/f any flop without an A or K.