I have deleted a lot - I used to down load every SINGLE danged freebie out there!
What I didn't delete I did lose a lot when my EHD crashed since I'd only double backed up my "better" and organized stuff. I'm getting another EHD this weekend and I'll probably start purging again. Not only has the quality improved a millionfold in the last few years, my style has evolved too so some stuff I'd just never ever use.