Had this kind of trickyish spot i'm not sure about. Villain is an pretty good reg i've played with a fair amount, on the aggro side and likes to fight for pots a bit. Won't perceive me as a nit and prob slightly looser than most in general.
$50nl
I open

in the CO to $1.50.
Villain flats BTN, rest fold.
Flop

I cbet $2.25, Villain flats.
Turn

I check, villain bets $4, i fold?
Can see merits for a few lines postflop i think. Wondered what other people thought?