The reason compared to 'Reign of Fire'
Its just as bad.
Most people I know that went to see "Reign of Fire" (ie. people that love dragon movies) walked out half way. There is barely enough action in "Dragon" to make the comparison to the other movie in any case.
"Dragon" has poor acting, poor story, and looks like a LARP campaign put together in a few minutes before a camera. The dragon wasn't too bad if a little on the 1980's side of CGI (making it look like a big rubber suit), and the actress playing Freya at least had tried to look and play the part.
In the commentaries the actors mention this being a low-budget film - They were correct! Really low budget! About the only good bit is the music! They didn't even get the pronunciations of Celtic/Gaelic words right!
I'm happy I rented this first...