Writing out a proposal specific to the potential client?s needs and never hearing from them again after hours of free consulting and rewrites with the verbal commitment that the project is a go but we just need to fine-tune it.
People using their cell phone while driving.
And, for the grocery store 'what bugs me': a female thinking that I want to stare at her while she is trying to figure out what item to buy while blocking the lane. One day I will lose my composure and tell the girl in a loud voice that the hun.com posts prettier pictures than her instead of saying excuse me.
