Things that bother me:
1. People who walk around at night in neighborhoods without sidewalks or streetlights, particularly when they wear road-colored clothes. Every day on my drive home I come close to killing many, many people.
2. The word affidavit. I misspell it as "affadavit" 99% of the time.
3. The shape of footballs. You know how virtually every other ball in the world is round? There's a reason for that. Round balls are easy to throw and bounce predictably.
4. Vending machines with weird selections. I'm looking at you, work vending machine that does not have pretzels, regular potato chips, or M&Ms, but does have have multiple types of Fritos.