I read a review of the recently-published "Schulz and Peanuts" biography, which appears to portray him as cold, distant, occasionally womanizing, and plagued by chronic agoraphobia. It's not entirely filled with unflattering content, but several reviews I've seen gush at how it's the first real view that we've seen into this side of his personality.
Well, according to his family and friends, it's all a bunch of crap. They say they were interviewed extensively by the author, and their quotes were both distorted and cherry-picked in an attempt to further the author's view of Schulz.
Their rebuttal started out in the form of Monte Schulz (the eldest son) posting comments to a review on Cartoon Brew, and the discussion grew to include contributions from other children of Schulz, his widow, lifelong collaborators, fellow cartoonists, and fans who were lucky to interact with Sparky. Their anecdotes are almost all touching.
Here's the page with the comments. It's pretty clear that the comments therein contain a more accurate picture of the creator of Peanuts than the book does.