I know this is an old thread, but I remember it making some kind of a small impact on me, or at least getting me to look at things from a different prospective.
I really did only collect clothes and books, but I still managed to spend money on unneeded junk, to make bad purchasing decisions, and to find my closets full of things I never use/need/wear.
Well a year or two later, the materialistic side of me has definitely been evolving. I still like nice things, but I just don't need to acquire acquire acquire anymore. My personal and professional concerns occupy most of my thinking now, I am much more content with less while wanting more from other more intangible things in life. Since I've started paring down, I definitely find it liberating - less things to worry about, more space, more disposable cash to invest and spend on things like vacations, etc. More importantly, I can walk away from everything I own with a suitcase or two, and be absolutely content. Physical objects just aren't that important to me anymore.