This is a guy with both hemispheres working quite well. A scientist and an artist.
http://www.normankoren.com/index.htmlI heard about his tutorials a few years ago and used his introductory and scanner tutorials to help get me started, and then after I settled on Picture Window Pro (PWP) for processing I was have looked through those sections a bit.
Rumor has it he is working on a book, which for me would be easier to read and use than web pages.
I'm still at the trial and error stage, trying get used to the most basic steps. As I muddle along, I find reading his site helps me figure out a bit more of what I am trying to do.
Another kindred spirit is the author of PWP who has put up a number of white papers. They do have PWP "how-to" tips in them, some more than others, but most are are very helpful in understanding how things work in general, since most of the PWP "how-to" stuff in in a separate manual. To see the white papers, click the "articles" tab on the main page
http://www.dl-c.com/