Matt's method I think is the best, and I was coming in to post it if he hadn't done so already...
But for me it was always generic AEA Stage Manager blah blah blah, or I'd customize it by show but remove it when needed. I'd leave it for family, but if I was job hunting I'd leave it to AEA Stage Manager. The company I was talking to could figure out what I was doing by my resume.