I must confess I haven't seen How to Train Your Dragon yet. I just had this urge to draw dragons at least how to appeal to the inner 8 year old in me.
A bit of inspiration from Metal Gear Ray, it has such an organic design, hard not to be inspired by that.
A lot of my inspiration came from Final Fantasy Tactics and Record of the Lodoss Wars series. More so Tactics because they showed a lot of shape in such small sprites.
Hard for me to resist drawing crazy spikes, and billion scales, because as a kiddie I would get stuck doing that.