"Your preferences are not universals."
Good point, since that is not even true in my own mind. What I hate, is an introduction that "explains", I like show don't tell, or better yet "make me think." I loved the introductions in the Belgariad, because they had absolutley nothing (overtly) to do with the story. They were short, well done, equivalents of bed time stories that later in the book I could go "oh, I get how that fits in!"
"This reader really likes the things that can be done with a good introduction, and tends not so much to like stories that are very obviously trying to hook hard and fast and early."
I once read an author describing how he worked as "when I'm writing, I skip over the boring parts." and I find that sometimes I need to write them - so I understand them - but I don't need the reader to read them. I'm all for writing more than is needed and trimming.
I also really like the "show, don't tell" example of the burn/campfire. Well done.