Your decision to check and call all the way on this flop agaisnt this specific opponent is dead on. There is no way you can even think about folding TT on this board vs this player, and I see no reason to get aggressive at any stage in this hand since you want to encourage him to bet worse hands than you, and you certaintly dont want to play back at him since you will probably spend more money and still have no idea where you stand in this hand. Against these type of players it is usually best to just try to get to the showdown as cheaply as possible when you have a mediocre hand. On the river, you should definitely check and call. If your opponent doesnt have a hand he will still bet this river hoping you do not have a diamond and will fold. Betting this river is only correct if you feel you can safely fold to a raise and this opponent certaintly doesnt match that description. Checking and calling the river is best since the villain will still bet many hands you can beat.