I miss improv. I hate it in a way - watching it, doing it - but only because it's so challenging and nerve wracking. Improv is the only belief system I've ever experienced that directly works on how to be. Just how to be.
The thing about the performance part... starting with improv and standup, you're starting with yourself as the character, and I don't feel as much like, 'Oh, I'm a vessel for -' I feel like someone who calls themselves an actor is a vessel.