Nobody grows old merely by living a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.
I almost always do things that I like, in some form or fashion. Every once in awhile that means that I don't think the script is any good and I don't have any trust in the people, but the film is shooting in Sri Lanka, or somewhere like that, so I'm going.