Things I used to collect but can't afford to invest money into anymore: Furoku, comic books, odd costume clothing.
Things I still collect: Fortune cookie papers, movie ticket stubs, airplace stubs, and event stubs (concerts, places I've been, etc.). I also collect bento boxes, and other things from Japan. Books. T-shirts (I plan to make a quilt out of those one day.. I swear..)
That's all I can think of right off the bat.
Things I collect but not because I decided to collect them.. life just sorta threw them my way: Kitchenware, perfume, shoes
Something I'd like to collect: Original Artwork, both 3-d and 2-d.