I read an article on how to be annoying...a really funny piece...Here are some of them :D -

1) Leave your indicator on, for the complete duration of the ride.
2) Repeat everything someone says as a question.
3) Holler random numbers while someone is counting.
4) Invite lots of guests to other's parties.
5) Drum on every available surface.
6) Change channels 5 minutes before the end of the show.
7) Forget the punch line to a long joke but assure the listener it was a "good one".
8) Follow a few paces behind someone spraying everything they touch with room freshener.
9) Never make eye contact or never break eye contact.
10) Signal a conversation is over by clamping your hands over your ears.