I play regularly at bullet (1 minute) but when I lose I really do get angry. I used to be a 1100 player but am now a 2000 player which is a pretty high rating (for me) but I feel the pressure I put on myself and the amount of games I play is a direct result of how I have improved so highly.
The issue is that when I lose I really get frustrated with myself to the point of actually slamming my mouse, or just letting my clock run out.
Why is my nature like this when playing chess because in general life I am a fairly laid back person without ever losing my temper.
After about 5 minutes of the rage starting I have calmed down and can then play again or do other things.
This does not happen with any other games I play, just with chess.