I’ve done improvisational theatre for two years now, and I’ve been a roleplayer (mostly the GM) for twenty years on and off. Improv has done a lot to make me a better player; and for a long while I thought roleplaying made me great at improv. Sure, I had my strengths, but this post focuses on what I sucked: listening to other people. There will be sequels.
Improv and RPGs, part 1: Listening to others