[MicroBob]

i think a key here is that you sensed that you had tight table-image.
you had obviously been on the table long enough to convey an image and determine that you might have been up against a bunch of folders-when-they-dont-hit.

also, since YOU limped in pre-flop then they are thinking that you could have virtually anything. they certainly aren't putting you on over-cards since it was only a limp....followed by a post-flop check-raise.

bets from the blinds on raggedy flops tend to get a little bit more respect imo since the rest of the table figures they are more likely to have matched the board.

i think there was a very good chance that your bet on the turn would have bluffed-out your opponent and was worth a shot, even with a small pot.

i don't think i would have check-raised the flop myself, but you seemed to have a decent read of the table so it seems like a decent play to me when there's a good enough chance that the flop missed everyone.