I had a CC game recently for a team match in which I played well, and so did my opponent. Transitioning into the endgame, I sacrificed the exchange, and eventually my opponent had to give it back, with interest. I then whittled down his defenses into a won KRP v KR (lucena) ending. About 2 moves before reaching the actual Lucena position, but past the point where he could set up a Philidor, I blundered a simple skewer, losing my rook, and the game. I kicked myself for a minute, but after that, oh well--he did well to play on and catch my mistake. No problem for me, it happens.
At the last tournament I was at, I was playing terribly, and in game 4 (with 0.5/3), I made some stupid moves and got myself all tangled up. I was more enraged than depressed at that point and decided that yeah, I may lose, but pieces are gonna fly first. So I went for the ridiculous line that I couldn't read out. I ended up winning that game, but my point is that the more personal the game, the more it hurts to lose. I put effort and time into my CC games, but the tournament games are more of an investment, both monetarily and emotionally.
heehee!