WoW would have been incomplete without them and I think we've gotten an amazing variety and means of interacting with them. They can be mounts, they can be raid bosses, they can be the big bad at the end of everything, they can be sentient beings who watch over Azeroth. I almost always enjoy interacting with them, (almost).
The new Pandarian dragons are very much Chinese inspired and I love the way they fly in an undulating manner through the air. Order of the Cloud Serpent was one of the first exalted reputations I earned.