Instead of playlists, I've recently been listening to whole albums while I'm working and have no one to talk to, or just chilling in my room. I usually listen to the Gorrilaz debut/self-titled album and cycle between a few AFI albums (Sing the Sorrow, DECEMBERUNDERGROUND, and Crash Love) in no particular order.
If anyone else does this, I'm interested in what album you've dedicated time to actually listen to "as the artist intended," so to speak.