Biggest pet peeve: littering, especially cigarette butts. The people who do this don't give it a thought that they are littering. I could understand it if they discard lit cigarettes on their carpeting at home, but I doubt they do this.
How about some word pet peeves:
Quote unquote (with the quotation afterwards so you sometimes never know when the actual quotation ends!)
Dropping the second "i" in poinsettia.
Unthaw???
Orientate - this shouldn't even be a word. Orient will always do just fine.
Cheesy as a negative descriptor. I love cheese! It should be a compliment.
Irregardless
And how about flashing over to another call? To me, that is like telling me the other caller might be more important than me. I hate it.
Verzem