Ugh. I hate that. And it's happened to me more times than I can remember.
A lot of tv shows: I don't watch much network tv, or am able to commit to any type of series. I just don't have the time or attention span. And because a lot of what's on I find to be insipid, boring carp. But I never voice my opinion. What I do watch, however, is a lot of "real life" NOT reality shows on cable, and so on. And get comments on how can you watch that stuff, its boring, and so on. And also comments about why I don't watch the "popular" stuff everyone else does!
Clothes. I am the queen of bargain hunters, but am willing to pay a bit more if something fits really well, looks good, and is well made. I belive in the "you get what you pay for" mantra, but I still have people who will ask me where I got something as they like it, but feel the need to comment on how they would NEVER spend that much, once they find out it wasn't a $2 clearance special somewhere.