DR JRand and others who direct shows:
I simply cannot believe these cast people. In all the years I have done theater, I have never missed a single rehearsal nor been late for a single rehearsal (even shows where I was driving almost 60 miles to the theater each night). I was in rehearsal during both root canals that I've had in my life, and I didn't beg off from rehearsal because of the surgery. You get cast in a show - you be there for rehearsals when you're called. It's just that simple.
To be honest, I've never felt any of the directors around here showed gratitude over such dedication since many people do miss rehearsals (for a variety of reasons, some understandable, often not) and still get cast in shows, but that's the way I'm made. Just like I never took cuts from class in college even though I had unlimited cuts, I couldn't NOT go to a rehearsal if I'm expected to be there.