Dragons are some of the oldest fantasy images we have as humans. While they have meant different things in the past to different cultures, I think now we just kinda like them.
They are still monsters in our stories, but not all of them. How I trained My Dragon has many good and cooperative dragons.
My favorite take on dragons are from ShadowRun series. Dragons are old and intelligent, and just kinda run giant mega-corporations. Why not.
But, apparently, they can be annoying:
Skyrim maybe use a few too many?
I like designs with dragons because they can look striking and bold. I mean, I could make a striking bold design of a guinea pig, but Dragons are my favorite.