[BeerGolfPoker]

I like checking behind on the turn here and calling any non diamond river card. If he is aggressive and tricky he very well could checkraise you again with a flush draw or some other hand against which you have 6 outs, and this sucks.

The negative of checking behind, however, is that you allow him to draw freely. BUT, I think the EV lost by giving him the free card is more than made up for by letting a "tricky and aggressive player at the wrong times" bluff the river when he misses his flush.

Edit: Oh yeah, given how you played it, the river check is standard.