well. One of the screwups that I didn't forget: I was at a KoF 2003 tournament at a con (that tournament wasn't competitive at high levels, I should mention), don't remember when. As my match went on, I had my Gato facing the opponent's Ash, and there was only 5 seconds left. I was winning, barely. So, in order to not win by time out, which I thought to be shameful, what do I do? I try to pressure my opponent, jumping towards him hoping that he doesn't do the one thing that he can do.
As the match ended, I stared at the screen for a few seconds, thinking to myself "what have I just done. Congratulations, stupid.". After me and my opponent shook hands, for a tight match, I promised to myself that I'd (ideally) never again bother being called cheap for using the timer to my advantage.