All of this is helpful exept for the head (just in my opinion) I draw my dragon heads w/o any geometric bases but im sure that this will really help those who do draw the "bad examples"
Also i like the discriptions for the fail wings especialy the one you called "Physical Bull----" despite the fact that i did use to draw it like that XD
The wings on spyro characters annoy me too. you look at the start of the wing membrane and it looks like its not there. sometimes i wonder how they can be stable enough to lift.