I did this a while back, but my scanner started working just now
Done with a ballpen on a paper.
These are two different types of dragons - the one on the left is a standard design, I guess... The right one is actually from my story, so he is a little different than the regular type. The three spikes on his lower jaw are useful when hitting enemies from the side. xD
Anyway, who would you vote for? Which design you like more?