You know, I used to feel that way. But in most cases, I watch a piece of media once, maybe twice and then delete it. I don't keep it the way some people collect DVDs or CDs. I don't get why people have walls of DVDs that they've watched once. How can they afford it? The only DVDs I have, I watch constantly. Or they were gifts.
It's satisfying to have books lying around that I can always pick up, I'll admit. I like rereading books a lot more than re-watching movies. But that has to do with the fact that a book is an act of co-creation by the author and the reader - the story only unfolds in the reader's mind. Movies are much more linear.
I rarely re-watch movies unless they have uncommon depth or amazing visuals. I'm never tempted to watch special features either. They're usually kitschy and short anyway.
I used to do it too with downloads, until I realised I was sifting through terabytes of media and couldn't find anything I wanted to watch a second time, especially when anything I originally did want to watch again I'd already watched like 4 times by now. Now I just delete everything after watching.
This is so shit, I hope Rapidshare manage to stay alive. Torrents have always been my last resort, I don't want them to become my go-to source.
