"I think that if I had grown up and had been in show business and the movies twenty five, thirty years earlier, I think I would have made a lot more musical movies"

Christopher Walken is recommending that if he had remained in the entertainment industry previously, he would have had more chances to make musical movies. He implies that the market has actually altered for many years, which there are fewer chances to make musical motion pictures now than there were in the past. This might be due to the changing tastes of audiences, or the increasing popularity of other genres such as action and funny. Walken's quote suggests that he has a terrific gratitude for musicals, and that he would have benefited from the chances to make them if he had actually been in the market previously. He is also expressing regret that he was unable to make more musicals in his profession.