Here is an interesting read I found, It is old time-wise but new to me.

www.cosplaylab.com/events/ax/2004/ragnarok/default.asp

"Who taught you to draw? It's amazing!

I didn't have a formal teacher. Ever since I was young, I always practice drawing on my own"

That, in my opinion, is jaw-dropping.

The man who single-handedly drew each and every sprite had no formal training? 

Epic.