la petite moi

I think some things that bug when people are driving are:

+General carelessness/not being a defensive driver (no turn signal, swerving on accident, pulling too far out into my lane, etc).
+People sitting at a red light, in the right lane, blocking anyone behind you who might want to turn right until the light turns green and you get the heck outta the way.
+People on their cell phones- IT'S ILLEGAL IN CA, PEOPLE! GET OFF THE PHONE!
+People who turn on their EMERGENCY lights while they're dropping someone off at the grocery store- uhm, hello, yes, you can park and walk in.
+People with deep bass music blaring, or playing loud rap/rock music with their windows rolled down. Believe it or not, I (along a lot of people around you) don't wanna hear your trashy, disgusting, and offensive music!
+People who block traffic because they decide to pull up next to their buddy (also in a car), lean out the window, and start yacking.
+People who wave you on at a four-way stop sign because they think they're being courteous. No, you are just disrupting the flow of traffic and confusing things.
+People not letting you in when you have to merge, despite having your turn signal on, so you end up shoved into the shoulder or left to slam your brakes on.
+Bicyclists who don't follow driving rules, but don't get ticketed for it- I mean, come on, I've seen bicyclists riding into traffic ride right past a cop, and they don't get stopped. If I were to do that, I would a) probably die and b) get stopped immediately by police.

And number one (and you see a lot of these where I'm from!):

GIGANTIC TRUCKS! Guess what? Having your ride raised so high that I cannot see around you is not going to make your junk any bigger, so please, do all of us on the road who actually CARE about the environment a little bit a favour and get rid of the disgusting monstrosity.