I love the "playlists" though I rarely save them. In my preferences I have double clicking from the library add to a new playlist. Usually I just double click a whole album, it immediately starts playing in a new playlist and I can shuffle it or loop it as I see fit. That one song on the album I don't like? I just right click and "remove from playlist", now I don't hear it. Sometimes I'll search for a keyword or artist and select all now I have a playlist with everything that artist worked on. Maybe if I've been adding and removing stuff from the queue and I like the way it's feeling I'll save it for later, or just leave its tab there for a couple months till I'm bored with it. I always keep a "dynamic" playlist tab open for when I just want a shuffle across my whole library. If I see something coming up I don't want to hear I just delete it (or reshuffle the whole thing which doesn't affect the currently playing song).