[ANOTHER FLAME WAR] Are dragons overpowered or not?

I hate to interrupt you, esteemed sirs, I see you are engaged in some highly intellectual conversation. But I would like to return to our topic... dragons. I have a rather elderly relative, and when he first saw a fantasy film on DVD, he tried for a long time to tell us what it was about. I only remember the beginning: "And so, a DRAGON flies!" Since then, it's become a habit...