Anything on E4, the entire channel seems to be set up to piss me off. Most BBC programming, but particularly anything involving dancing. Channel 4's attempts to be 'shocking'.
Any needless, purile, recycled comedy film with a **** script which seems to have been churned out of Hollywood solely because somebody had a contract to make 'a film' and that was what popped out of their studio. For some reason, comedy films of this nature annoy me more than any other kind. They tend to be sold with the 'stars' making a silly face on the side of a bus, next to an annoyingly bad tagline.
Materialistic RnB/rap, boy/girlbands with questionable talent, anything from a musical.