Main and biggest one for New Year and Christmas - chinese Santa Clause figures, with really bad renditions of songs, that are everywhere at this time. Make me wish I could break each and every one of them.
Second one is co-workers and friends who think that the only way to celebrate is to go out to some party, club or restaurant. And don't get me started on corporative parties - I have skipped those last two years and fully intend to skip it again. Couldn't ever understand why everyone thinks it is so great - or pretend it is. I think, I heard it best summed by one of my co-workers: "People want everyone think they are having a great time, but as in truth they don't, they drink themselves stupid. And 99% of people at the party are doing it."
[ETA] if this will come under wrong Writer's Block - look up my earlier post.