What's your biggest annoyance with dogs?

I see alot of points, but i'm curious what the absolute worst thing about them is to you? For me it's the arrogance. Yes, I know. Animals can't be arrogant, but DOGS CAN. I've seen it, they watch you whilst you eat begging for food, sit on the couch, misbehave, bark at everything, expect everything and it's annoying