What is the most common misconception people believe about you?

Sometimes that I’m lazy, or my speech problem can convince others that I’m mentally slow because it compounds as I get flustered by it and can break down communication. It’s been assumed I’m careless and callous, and that I don’t care for those around me. When I do, I’m just naturally monotone and inexpressible. I look like I could be a real bastard but I’m not and it’s always the first assumption that comes my way.