In the show, Jason is the only one who doesn't dismiss Zordon outright when he approaches them about becoming Power Rangers. It's that kind of laid back attitude that Austin St. John shared with his character Jason, and big reason for why he was so well-loved on set. In the end, he was the leader both in the show and around the set, making sure that everybody was enjoying their time filming.
Born in 1974, Austin was only 19 years old when he was cast as the Red Ranger. Although the experience might have changed his life, it hasn't changed his outlook on life. He did the show because it was just a little bit of fun, and although he's appeared in several entries in the franchise since, he's never seriously pursued a celebrity career.