Opp is 39% VPIP and 18% PFR at 100NL 6max, PT rates him as Slightly Loose Aggressive preflop and Aggressive post flop. Prior to this he had never played back at me--I was playing fairly loose and stealing a lot of his blinds (he is the BB here) on the button.

1 limper UTG, folds to me on the button, I see :Jh::Js: and raise it to $4
SB folds, BB reraises to $8, UTG folds, Hero calls

Flop is :Jd::Ks:, villain bets $8, Hero reraises to $20, villain folds, Hero collects $31.90 from pot

What do you put him on here and what do you do on this flop?