Scott Edelman's blog has some detailed character descriptions believed to be written by Stan Lee in the 1970's. Scott was an assistant editor at Marvel Comics at the time, and he did print these in an issue of FOOM. For more information, check out his post: http://www.scottedelman.com/2012/02/11/did-stan-lee-think-cyclops-should-sound-like-anthony-perkins/
Apologies for the scans, but with my secretary on vacation, I was unable to provide a transcript. However, you can click on the image for a larger version. Also, I know how much my readers appreciate rare X-Men art, so I have included a dose of John Romita Sr. to keep you from going through withdrawl symptoms.