QQ on K high flop

[Profish2285]

This is a situation I have found myself in alot recently. Im know folding is the default but it just seems so exploitable. Anyway, my read on villain is that he likes to bet with mid pair when checked to. He also calls down bets with mid pair. So Im going to label him as a LAG. His stats suggest otherwise but its over a small sample and observing his play, hes definitely LAG. I really had no idea what to put him on so I guess if everyone could come up with a range that would be good too. Comments on all streets appreciated.

Full Tilt Poker, $0.10/$0.25 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

UTG: $27.50
MP: $18.10
CO: $56.90
BTN: $4.30
Hero (SB): $25
BB: $8.35

Pre-Flop: Q[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
UTG folds, MP calls $0.25, CO folds, BTN calls $0.25, <font color="red">Hero raises to $1.80</font>, BB folds, MP calls $1.55, BTN folds

Flop: ($4.10) K[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $3</font>, MP calls $3

Turn: ($10.10) 6[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, MP checks

River: ($10.10) 4[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">MP bets $7.50</font>, Hero....