The girlfriend and I were out shopping because she needed a new pan. In the parking lot, we came across a truck that had taken up two parking slots. The GF harrumphed and said how she hated people who did that. I saw the same thing, but it didn’t bother me so much. Why? Because the truck wasn’t in a premium area of the lot, and there was plenty of other parking.
My girlfriend was annoyed because the driver was breaking the rules. I wasn’t annoyed because (s)he wasn’t causing harm. I’ve found that such criteria has become much more important as I’ve matured.