I think your small river bet was exploitable.  I like check/call on river since his stats are kinda LAG.  I think he would raise you on flop or turn with 2pair or set.  The only three reasonable hands I can see him having that beat you that he would raise on river would be A8, Jc9c, or 6c8c (if i'm not missing anything).  I think he would raise flop with 7c8c seeing that he is an aggressive player.  I just see his line as kinda fishy without having any other reads or history.

River play- I would either value better a little bigger and then fold to a raise since small bet is asking for a bluff raise.  I like check/call best and I guess check/fold might be ok (a little on tight side imo).  Hope I gave you good feedback and hope it helps!

If he has a better hand he's going to raise regardless, just betting a little bigger takes away most of the guessing game to whether he is bluffing or not.  Your small bet showed weakness and may have induced a bluff from him.  A larger value bet shows strength and less likely to get bluffed.

You don't have a lot of stats on him but 35/26 is loose aggressive.  Usually if they're LAG pre flop they more often then not are LAG post flop.  Just a generalization to use with not a lot of stats.

I wouldn't rule out betting the river. If the villain is passive, i'm comfortable value betting here. 

I'm not sure how he would perceive your range but you can have Axx that is two pair yourself. So he can't be freely raising the river every time you triple barrel this run out. 

I don't mind this line at all (i take it myself). Until you see villain raising similar spots with a high frequency, i would simply fold. 

i would hesitate to check/fold here as he does have some reasonable draws in his range. 

i'm wondering if your 1/3rd bet induced a bluff-raise?! that would be my main concern

You can discount hands like flopped 2 pair or set, since villain is less likely to slowplay those hands on this board.  There are some other 2 pair hands that beat you, like AT, A8, 8c7c, Tc7c, etc, but there are also some Ax hands you beat, plus some draw hands that made a pair on the turn or river, like a KcTc type hand, that may decide to bluffcatch the river. I would be betting about 1/2 pot on the river, and folding to a raise.

I think checking with the intention of calling a bet is fine here as well, since the flush draw missed, and checking allows villain to bluff, or perhaps value bet with a hand that may not call a river bet himself. I think betting yourself though is the slightly better play.

well played. I think his shove has well more value hands.. unless he was tilting a ton and spewing worse