Marginal call down situation

[Megenoita]

BB here is a 74/2 after 100 hands. His flop agg is .36 and overall agg .5. Still, I think HU I may be good here. What situations is it correct to call down here? What's the least agg opponent I should call down? Wouldn't even a fish raise the flop with AT?

Party Poker 5/10 Hold'em (6 max, 6 handed) converter

Preflop: Hero is MP with J[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls.

Flop: (6 SB) T[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, SB folds, <font color="#CC3333">BB raises</font>, Hero calls.

Turn: (5 BB) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero folds.

Final Pot: 6 BB