Ya I agree it depends on the table dynamics of course. The 5/6 doesn't block anything so how many boards out there are we going to like getting a lot of action on that don't give us a chance at the flush? A(2,3,4)x? I'd be more inclined to call/shove a turn if I had either a J/T in my hand. Otherwise it's bet/fold.
The OP got cold called by both blinds, so on a coordinated (no-flush) flop I can't think of many hands that are going to fold to a CB either.
Was the BB putting the hero in AA-rags? My guess is that it didn't matter