E-mail worms annoy me. I got one from someone in one of my classes. This one was kind of cute - it used one of the e-mail addresses in the address book of the infected person as the From: address of the e-mail carrying the worm. I had to go into the headers to figure out who it actually came from.
What really irritates me is silly tech support. I sent an e-mail to my school's virus account warning them it was going around, and offering to forward them the infected e-mail if they'd like. I made a point of mentioning in the e-mail that I wasn't worried about being infected, because my laptop uses Linux. Their response reads:
Thank you for the information. Make sure that your virus definitions are up to date.