It's almost as if the Jupiter characters were given their hobbies as an afterthought—do they ever refer to them in the game? It's very easy to picture some great situations they didn't take advantage of, but that they could use in the anime.
Llike Hokuto expecting to win Makoto with an impressive violin performance—not realizing that sporty Makoto isn't much for classical music, or that Shouta has replaced Hokuto's violin strings with rubber bands (okay, maybe this is a little too close to the Three Stooges now!).