I also hate when someone is doing something repeatedly like clicking a pen, or tapping on the table. At times I try to tone it out, but man if someone catches me on the wrong day it sends my head spinning.
People that don't know how to walk in the store. You walk the isle just like you drive a car. Not too difficult.
I also hate when people try to carry a conversation about what I am purchasing at like the grocery store. Yes these are meals I am going to make, no you don't need to judge my meal options, and please don't tell me I have nice jugs when walking out with 4 gallons of milk. ( This has happened to me twice).