I've recently read that Jimmie Walker who played J.J. didn't get along too well with his on-screen parent actors John Amos and Esther Rolle since they became increasingly frustrated with the popularity Jimmie was getting as the series went on. They thought his buffoonery and catchphrase "Dyn-O-Mite!" was playing into negative stereotypes and detracting from the social commentary the more classically trained actors felt should anchor the show. For me and my siblings though, J.J. was the star and we loved his silly moves, over-the-top personality, goofy faces and yes, his ever-present catchphrase.
Re-watching as an adult and again living in times like the 70s with out-of-control inflation, decaying social fiber and rampant discrimination, the then-topical issue plaguing the Evans family are all too real today as well. Now though I'm no longer J.J., I'm the worrying Florida. But I won't be praying to Black Jesus for my salvation.