Nothing has ever felt better than my student days with DC++. The whole campus had a server we all used and I could search for stuff I liked and see what other people who had that on their disks also had, and explore that. I found a lot of music that way, as well as other stuff.
Before that we had had a list of ftp servers which was also good once I wrote an indexer, but DC automated all that and made more people able to participate.
I hate the Netflix interface enough that I prefer to watch movies other ways even though I have access to it.