I got the new nano for Christmas (and my tricky wife totally totally psyched me out on the surprise ). A couple of months later I've disabled the accelerometer features as annoying and pointless and turned off the Voice feature as too intrusive; unfortunate because I thought that would be a real safety feature for iPod use while driving. However, the one feature I thought nothing of has become a favorite: Genius. I've a few basic playlists to crudely manage my music. But I don't care to actively manage playlists, I don't rate my music, and largely don't have much interesting in "managing" iTunes. Genius, though, means it's now trivial to make new and fresh playlists. And it does an adequate job of keeping to the style of the key-song that I can use it at work to make a list of songs for the tone I want when working, be it metal or mellow. Also important to me is that Genius is deterministic: given a song, Genius makes the same playlist everytime so I can recreate a list if I realize I liked it enough but didn't save it. If you've not tried the Genius feature yet, give it a spin. Whether you you don't like to fiddle with playlists, or feel like you're in a rut with your collection, it's a clever and effective playlist maker.