Currently I collect Slorgs, slorg-related items, zafara related items, stamps and neodeck cards. I also have a book collection but that is for books that I win from events and such.
Gallery link: http://www.neopets.com/gallery/index.phtml?gu=emopink
Gallery link: http://www.neopets.com/gallery/index.phtml?gu=emopink