$20NL home game, .25/50 blinds, 7-handed

Hero has about 50
Villain has about the same

Villain is a fairly aggressive player, and knows I'm tight. However, he usually does have at LEAST some kind of hand or a semi-bluff. He also tends to use the all-in push less when he is no longer a short stack (20 buyin)

Villain's minraise preflop has been everything from TT, KQ, AA. So, don't read too much into the minraise.

That said,

Hero is dealt A[img]/images/graemlins/heart.gif[/img]A[img]/images/graemlins/club.gif[/img] in MP1
1 limp to hero
Hero makes it $3 to go
Villain raises to $6 (very common from him)
Hero reraises to $15
Villain calls
(all else fold)

Flop comes: ($30ish)
K[img]/images/graemlins/spade.gif[/img]5[img]/images/graemlins/diamond.gif[/img]2[img]/images/graemlins/heart.gif[/img]

Hero has about $35 left here. Just push?
Should I just call his minraise preflop and try to get more out of him on the flop?

Reraise all-in preflop?

What's the best line against a fairly aggressive player who won't want to let go of the pot?