Ready. Set. Go:
2) Folks who can't keep a steady pace. Yes, I know that cruise controls can vary actual speed a few MPH depending on circumstances. But when you're normally traveling at 65mph and then drop below 55mph because you're driving up hill...that ain't cool, man. Also annoys me when someone will pass me on the interstate, pull into my lane, then slow down. I'll then pass them because I'M on CRUISE CONTROL...only to have them re-pass me in a few miles. Wash, rinse, repeat.
Yup, this one.
1) The discourteous SOBs who pull right out in front of you when there are miles of clear highway behind you. This type of dirtbag usually then proceeds to drive at least 5MPH under the speed limit.
3) Those that hit their turn signal AS they stop before turning. "Hey that's ok man, I don't mind sitting behind you waiting for you to find an open spot to turn, when I could have changed lanes half a block back when you SHOULD have turned your signal on".
Those too.
People turning left or right into dual lanes. Instead if staying in the closest lane they swing over to the other lane as they are turning. They seem to cut off any traffic in that lane. Drives me nuts.
OMG yes. There's an intersection near my house that would flow so much better if everyone would follow that rule.
My own contributions:
1) Left lane campers. I don't care if you're going the same speed as everyone else in the left lane - if you're not actively passing somebody get out of my way!
2) People that try to wave me through a 4 way stop. Let me explain: Car A will be already stopped at the 4 way, and I'm just rolling up to it, probably 5 feet away still. Car A feels the need to wave me on. Just because you waved me on doesn't mean I'm allowed to not come to a complete stop. If you'd just proceed like you're supposed to, you'll likely be out of the way by the time I've made my complete stopped and verified that it's safe to proceed. If you wave me on in the above circumstances I'm likely going to take even longer to do my normal stop in the hopes you get annoyed.