What is your worst quality?

There can be more than one bad quality, and it can be either physical or psychological or both. Whatever you find problematic about you is fair game here.

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1 mo
My own worst quality is my penchant for biting sarcasm and my intolerance for stupidity. If you are a regular on here, you may already have noticed these things about me. One of my teachers once said about me "he doesn't suffer fools gladly, or really even at all."
What is your worst quality?
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