There are a couple of things that get under my skin:
1. When hosts on cable news "tease" or "package" an upcoming segment, then keep you waiting for 30 minutes or more.
2. When radio talk shows come out of a 5 minute + commercial break, only to have the host spend another minute or two extolling the virtues of LifeLock, or some other product they endorse. Whenever I sense that, the station is immediately changed.