What really grinds your gears? What's something that it almost inconsequential but really pisses you off?
I guess one of mine is people who absurdly park over the line in parking lots. When I see that, like a wheel fully into another spot, I want to destroy they car. I want to leave no remnants that a car was there.
Another is people who use their cell phone in a public setting without regard to everyone around them, especially people waiting in line to checkout. Your life isn't that important that you need to be on the phone amongst the public. Do your fellow humans a service and get off the damn phone. Or, at the very least, go away from everyone so you can make the call.
I know, I have a problems.