things that irritate me:
* any sort of chewing with mouth open/hearing chewing or swallowing, etc
* spitting
* when people try to talk over each other, especially when they have nothing important to say
* close-mindedness, ignorance
* "I don't like to read lolol"
* INVASION OF MY PRIVACY: do not touch my computer, do not sit on my bed
* don't hover over me
* Negativity
* when women sit with their legs spread wide
my #1 however, is when adults fail to understand when to use your/you're, there/their/their, accept/except, etc. correctly :-/