Funny that you mention it, but there was a time when I returned to his books almost exclusively because of his personal and biographical digressions and allusions. It probably isn't surprising then I was completely crazy about 
It, 
The Shining, 
Hearts in Atlantis, 
The Body (I still think 
Seasons are brought down a bit by both 
Pupil and 
Method, but maybe that's just me), 
Tommyknockers and most of all, 
On Writing. I even realised I keep re-reading the forewords and afterwords (especially to the short story collections), where he was usually very personal. I guess I really should read 
Tower then. Problem is, 
Gunslinger is a molasses-slow introduction (just like the first season of 
The Wire  
 ) and considering I am already midway through a massive series (
Dune) and a friend of mine (well, a preacher, actually, but somewhat of a friend too) keeps bugging me that I should read 
Malazan Book of the Fallen and I would also like to read 
Witcher before I'll play the game, I just have a hard time starting with it.