Ah.. you reminded me of a few I had forgotten as well...

-Babies (this can range from any age, not just infants..) who cry loudly in stores, theaters, restaurants, basically anywhere within my listening range.
-People who know nothing about computers at all, suddenly calling you over and say 'Okay, how do I do this' -__-;;;
-People that throw there garbage anywhere instead of in a garbage bin or even better a recycle bin!
-And people that generalize all country music as bad (chances are you have only heard the crappy lyrics)
-People that only like music for the music, instead of the lyrics. Listen to what you are singing x)