One of the best animated movies of all time. Is it a laugh riot? No. But is fun and playful and doesn't beat you over the head with it's message like other moments.
The plot works. Scottish Vikings kills dragons and want to kill their nest, kid wants to kill dragon, kid finds dragon, can't kill it. Meanwhile, he goes into very funny training with some nice supporting characters. Of cours there is a romance. How could you make this movie without a romance! It's akward, but few aren't. It does little to do with the plot, but oh well.
It looks and sounds good. Everything is framed nicely, and there are many moments I remember (Hiccup on a platform, anyone?). The score is stunning, and I say that because I noticed it. That is an achievment.

8/10