Nothing really...I say only few things can irritate me anymore.
1) People smacking...why do they feel the need to chew with their mouths open to food taste just the same with your mouth close..Shesh!!!!
2) People on T.V. who think they can act...hello stop trying you suck duh!!!!
and 3) People who lie....If you lie it doesn't make more friends and it doesn't make you interesting...it make you hated because people don't like liars.
That is what grinds my gear aka gets on my nerves.