The Hyperion Cantos is such an incredible work of fiction. Currently re-reading and am midway through the fourth book The Rise Of Endymion; this series captivates my imagination and would often find myself idly reflecting on it and the characters within more than a decade after reading. Like all works, it has its shortcomings, but I can give no higher recommendation than the first two books.
I really should re-read the series. I enjoyed it when I read it back in 2000 but it's a faded memory now.
Without saying anything specific to spoil plot poonts, I will say that I ended-up having a kidney stone while I was reading the last two books of the series. It was fucking eerie.