*small apologetic cough* I also have a novel available (from Amazon) in which there are a couple of talking dragons. There's also my take on a Welsh afanc. The novel is called "Slipping through the Cracks" and it's a print-to-order paperback as well as an ebook.
Just saying.
My own favourite dragons, as created by someone else, are Ursula le Guin's Earthsea dragons, and they inspired one of my songs, but I was sufficiently intrigued by Smaug in my teens to take his name as my bardic nom-de-plume in the school Eisteddfod. I do have a song in which St George's dragon speaks, by the way. He thinks he's had a pretty poor deal.
Growing up in Wales has a lot to answer for.