CO - VP:26, PFR:21, 3B:17, CBF:89, over 123 samples

Called from the blinds with the intention of a set-mine

Checked the flop with the intention of check/raising. After villain's call it narrows his range to Tx and flush draws. Is it likely that villain would 3bet his nut-flush draws here?

Hero chooses to lead the turn to prevent villain checking behind and realizing his equity if on a flush draw, and to extract value from Tx

This is the spot I found tricky. My first instinct was to bet/fold, but I had a friend ghosting my session at the time who suggested I check/call instead.

In my mind I feel as though a bet will not have any worse hands call. All Tx should be folding here, especially after the flop check-raise turns a large amount of my range into a flush draw. I doubt Qx would call here, as the only likely combo remaining in villains range is QT which will likely be folding anyway with the last spade; meaning the only combos calling here are made flushes.

However a check/call allows for villain to fire his Tx here that he feels is good, but also along with his now made flush combos. There is also a small possibility he could be turning a weirdly played A4s, 43s, or 54s into a bluff but I think this is unlikely.

I did make this plan in my mind as I checked the river, but upon seeing the sizing of villain's river bet I got a little worried. I'm not a very experienced poker player, but the sizing just reeked of value to me. So I tanked and talked it over with my friend, and just as we were about to call I timed out and folded.