I love working with a cast and a group of people every day which is different than recording because you're usually pretty isolated and alone. They serve as a good balance for each other.
In my cranky old age I actually prefer recording alone now on 'The Simpsons ' for example because I find that the director can just focus on what I'm doing and I can do a lot of variations. A lot of times when I record with a group I'll stay after class for another hour or two.
I believe the true function of age is memory. I'm recording as fast as I can.