Robert Loggia

An actor is an impersonator; he plays many different roles. If you played the same role all the time, God - that'd be a boring career. When you take on different roles and become a different person, that's called acting... It's a challenge.

I think there's really no rhyme or reason as to what keeps a show on air. Surely it's a numbers game, but some of the best shows get canceled, and some shows where you don't totally understand why they're on the air stay on for 15 or 20 years.