Tractors! Tractors drive me insane on the roads and ALWAYS seem to be in front of me, driving at 10 miles an hour, oblivious to the mounting chain of traffic behind them.
Wow, and I thought this was unique to the rural Southern US! Worse is when the tractor is pulling a large pesticide sprayer and you can smell the contents of it even with your car windows up and the A/C on.
So called sales at the grocery stores. It's a sale if you give them personal information and sign up for their discount card. Or the sale is, buy one get one free but the sale price seems to closely match the regular price of two. Generic brands give half the volume of a major brand in the same size package. Marked down or discontinued items which aren't really all that marked down. I miss the days of real sales and great deals.