One of my favorite series (that I didn't see listed) was the Pern series by Anne McAffrey. I can see how it wouldn't be everyone's favorite simply because in some aspects, it's juvenile. However, I loved the idea of a world where dragons choose to bond with humans. On Pern, just about every young person wishes to be a dragonrider. Some children get the chance if they're chosen to be at a hatching. A hatching is a momentous event because the hatchling dragons choose which child they'd like to bond with for life. Once bonded, they are the center of each others universe and live only as long as the other is living. Oh yeah, and these dragons can talk. If you enjoy reading about deep bonds, this is an excellent series.