The only show I've actually walked out of was Love, Loss, and What I Wore with starcatchers. As she explained earlier, Brooke Shields was terrible and we had both seen the show before with far surperior casts. I turned to her and was like - Do you want to leave? And away we fled.
Shows I wanted to leave? I spent most of intermission of Bullets Over Broadway agonizing over whether I wanted to leave and clutched my backpack through the entire lead into Act Two. I also wanted to leave Leap of Faith, but curiosity got the best of me and I stayed. I'm sure there is more I can think of, but those are off the top of my head.
"Anybody that goes to the theater, I think we’re all misfits, so we ended up on stage or in the audience.” --- Patti LuPone.