Hmmm...I'm pretty laid back so not a whole lot gets on my nerves too bad, but let's see:
I can't stand the music on the radio 99 out of 100 times, thus I almost exclusively listen to talk radio now. That's pretty enjoyable, but I hate how they take a commercial/traffic check break every 10 minutes that lasts for another good 10 mins. And speaking of roadway music, I guess I can't stand people who feel they have to blast their music (or at least the bassline of it)to the next block from their cars. And when they pull up next to you at the light they make sure to look (no, make that stare) at you to see if you can hear it, and are impressed enough to think they're cool. I prolly sound like an old man with my lil peeve rant, but I don't care!

*shaking fist in the air* Damn Kids!!