I buy some things that I never do anything with or use. Like books, or comic books, or DVDs. I just buy them and sit them somewhere. Is that "collecting?" I am not like a hoarder or anything but I have a whole tub full of DVDs and some boxes of comics. Some of the DVDs are still in the shrink wrap I think.
I go to the comic book store every 2 weeks and get current on some weekly comics but I don't read them. :/
For me though, the best thing I ever saw about inferior Si was somewhere on this forum called "Form of the inferior ENxP" or something like that. I am basically a hypochondriac and that post made me feel not quite as insane.