At Reads for Keeps, you can see some of my pet peeves with regard to books....at least, the peeves that were foremost in my mind when I was asked last week!
One pet peeve (that I go into in more detail over there) is a dislike of intrusive narrators--which, thinking about it more, is not just knee-jerk hostility on my part, but hostility arising from a very good reason--I don't want to be reminded that I am reading. I want to be dead to the world. And someone coyly sticking their head around the page and saying "isn't this a wonderful journey we're having together, dear reader?" is almost as bad, viz achieving total immersion, as one of my children needing help pouring the milk but not asking me for it in time.