I think that providing obstructions in the live setting is when you get something that actually means something, as opposed to just aping your way through your greatest hits.
I had this revelation, you are a lot better at the between-song stuff than you are at the song stuff. That was devastating. And I usually find devastating things to be pretty valuable.
I would play my Dungeons and Dragons songs and watch people's eyes glaze over, and then I would start joking around between songs, and all of a sudden people were lighting up and engaging.