Ozzy, I am SO big on that too. I'll go through spells where I'm so impatient to get rid of stuff, I have to really fight hard to not just run and throw it out on the lawn(!) No joke. (I'll see it over and over in my head. Grabbing stuff, running through the house/apt and hurtling it out the door. Heehee. I don't. But I really, really want to!)
Although I do it for aesthetic and organizational reasons (chaos really messes with me), it also dawned on me one time (when ditching stuff from a particularly ridiculous creation phase) as "getting rid of the evidence".