I'm a big fan of the blog Outer Life, and I'm digging his past three posts on books he should have liked but didn't. I'm right there with him on Stranger in a Strange Land, and haven't yet dared to pick up Gravity's Rainbow for fear I won't have discriminating enough taste to like it.
The series of posts made me think of Godel Escher Bach, which is a book that almost every smart person I know has says they've read and liked, but that no smart person I know has actually finished. If you have read the thing cover to cover, I salute you. If you haven't read it at all, I heartily recommend the first third, which is as far as I ever got.