Lost Highway is the one I played for friends to introduce (or re-introduce) them to the band because I was a relatively new fan when it came out and I wanted them to share my excitement. As for going back to any of them, I couldn't pick one because I go back and forth all the time. Usually a song on one album will get me thinking about one on a different album so I'll switch and listen to it, until another song or a discussion about lyrics or something switches it up again.