This hand on this missed flop has given me more trouble than almost any other. I have learned to check this as you did, but reads will be difficult with sooooo many cold calling 2 bets. I really like your c/r on the turn to at least try to force out the longshot or mp holdings. Still, lots of cold calls. Betting the river finally got you HU, but against what? I think MP3 could have AJ, AT, maybe JTs? or KJ, but probably not a big pp. I think you win more than you lose, but you have really found a great table for TAG play. Too many early calls, and way too many late folds!