He was an odd guy, that's for sure. Everyone knows he shunned publicity.
He shunned Hollywood money after their butchering of Uncle Wiggily in Connecticut. (Holden''s brother, DB, in Catcher was described as a Hollywood prostitute, an allusion to screenwriters.)
He also seemed to have a hard time forgiving perceived slights. He loathed John Updike, who wrote rather rudely about his obsession with the Glass Family at one time.
After a couple of local teens wrote an article he consented to in their school newspaper, he found something in it he didn't like and stopped allowing the neighbor kids to come around.
He sued his biographer, Ian Hamilton, to stop the publication of certain pieces of information.
That biographer, in In Search of J.D. Salinger (1988), wrote that Salinger had two completed, unpublished manuscripts in his possession. It will be interesting to see what the estate does, or is allowed to do, with those works.
I enjoyed Catcher, more so on re-reading as an adult. I prefer his short stories, "Esme" best among them.