I don't, but I'm beginning to think I should. Something I'm becoming more and more a believer in is that the average writer spends too little time seeking to become a better writer and storyteller. That they key to our success isn't how wonderful our ideas are but rather how well we write. Story structure feeds into that. I've done a few experiments with following other people's structures recently and sweet baby jesus, it makes everything so much easier. Because I'm really bad at it. Ironically, this makes more and more books bad to me, because they start trying to force the story before I give two craps about the characters and at that point I'm gone. I look at what's new and big and I think slow starts that focus on the characters are still very popular. Look at Harry Potter - that's a very slow character based start and we may not see a bigger book in our lifetime. The trick is to do it well and to ensure something is still happening. Something else I'm becoming fanatical on is the difference between Slow vs Sloooow. One day I may even figure what it is. What becomes a Classic and what doesn't is harder to predict than that. I'd suggest The Eye of the World is well on its way to becoming a classic and is definitely somewhat formulaic, to pick one example.