It’s kind of funny and weird to think of everyday life as an improv. Some corollaries:

1. We all have a responsibility to keep it flowing, responsive, and fun.

2. We need to stay coherent and not totally insane but without sticking rigidly to boring cliched habitual scripts.

3. There’s always opportunities to do or say something unexpected, refreshing, lively.

4. Sometimes you ought to play the straight character to let someone else do their thing.

I wonder if there’s also some compelling arguments against thinking of life as an improv theater. Maybe Alasdair MacIntyre’s virtue ethics would be an example because it emphasizes continuity within a life of community, like your character is much deeper than an act.