Pet peeves:
Not-ironic bastardization of language, to whit: ‘u’ instead of ‘you’ and hacker terminology – leetspeak or whatever it’s called.
Product packages that without close inspection seem to contain more product than they actually do, such as cream cheese containers with a concave bottom.
99% of advertisements, but especially ones that try to fraternize with me as if my weaknesses are kittens, babies, cool cars, or ‘slutty’ women.
Movies with stories that are not self-contained (Matrix 2, Kill Bill, and yes, on principle this includes Lord of the Rings – I would have preferred it released as one ten-hour movie with a bunch of intermissions. And think of it – it would be better for the cinema because they’d get more concession money).
All the usual – car horns, car alarms, cigarette smoke & smell, spam, and hockey season.