I lucked into a really nice combination in a recent game and must admit to being a touch hurt when my opponent just resigned without a word.
On the other hand in a recently concluded match people noticed that a number of games were producing a 1:1 individual score and the match had become very close. There was a certain amount of activity on the match chat board with participants rooting for their player in the few remaining undecided games. That was nice and we were all keen on a re-match as soon as the match concluded.
After an otb match most people talk through the game with each other. It just feels like the obvious thing to do. But I suppose you invest a good bit more into otb play. Still I think I'll start proferring a comment or two, perhaps just before resigning, when I lose a game. Maybe it will turn out fun to discuss completed games here.
I think it is weird and annoying to analyze in game if you did not explicitly agreed to before doing so.