Nut flush draw w/ mid pair....

Here's the situation:

Live game. 7-handed, $20 buyin, .25/50 blinds

Hero is holding A[img]/images/graemlins/diamond.gif[/img]T[img]/images/graemlins/diamond.gif[/img] in MP.

One limper in front of me, I make it 1.50 to go.
Everyone folds except the big blind, who just calls.

Villain is very aggressive, but not an awful player. Will call down some big hands with top pair, medium kicker. For the most part, a LAG.

Pot (about $4).
Flop comes:
Q[img]/images/graemlins/diamond.gif[/img]T[img]/images/graemlins/club.gif[/img]3[img]/images/graemlins/diamond.gif[/img]

Villain bets $4,
Hero raises to $8
Villain pushes all-in for something like $15 more

(pot is now at $24)

Hero ???

Also, what do you do in the same situation with nut draw and bottom pair instead of midpair?
...


(I folded here. The villain was VERY aggressive, which made me want to call. Did I make the right move?)