After slogging my way through the Book of Exalted Deeds I have to admit that it is far better than the Book of Vile Darkness. The logic is better but there is still a world created by this book that I just don't see anyone being able to play in.
The Master Planner has argued with me lately saying that I'm looking at this from an overly critical viewpoint; that I'm forgetting that the book is about 'exhalted' deeds and not just 'good' deeds.
I think that he's full of shit.
The book is presenting its case for a how a good character should be and how they should behave. There are places where the book focuses on the above and beyond that would characterize the 'exalted' monicker, but those sections are not where I have taken issue with the book's logic.
Now is the book scarier than the Book of Vile Darkness as the Bus argued?
The Book of Exalted Deeds creates a world where every act is a balancing between good and evil. Every time you slip up and damage your 'purity' you place the entire world at risk. If you stray just a little bit from their unreasonably high standards you fall into darkness and evil. And the world they create is one that is just too much to actually play in.