Wow, what a great thread.
I most definitely feel at home at the theatre. The first theatre I felt at home in was our community theatre center. As a young teeny bopper, I thought I was hot stuff making my way to the dressing room. Later on, it was the high school theatre and theatres that I frequent for touring/local productions. Whenever I walk in, I feel a sense of calm. I most definitely recognize the theatre smell.
I also feel at home with some shows. I've seen RENT many times, and the Nederlander is starting feel like home. In addition, I could see the touring production in a different venue and have that same feeling.
Today was my birthday, and the best part of my day was my commute (thanks to my collection of recordings) and reading this thread. Tomorrow, I will be celebrating my birthday by what else - seeing a show. It's a show that I've already seen, but I'm looking forward to seeing it again! I've also already chosen my birthday present- a cast recording of the show I'm going to see.
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?