Dragon Ball Z invented the shonen formula. If you watched My Hero Academia, or One Piece, or Naruto, or even Death Note, you've watched the spawn of this one. By today's standard is not really good. After the Frieza's arc, things start to get bad. It was a manga without a clear direction, in which choices were made on a weekly schedule, based on character popularity and editor's choices. It is a product of its time. Judging it by today's standard wouldn't be fair. The show itself suffers from bad pacing due to the fact that was made with the manga, so it had to wait for it. The "Kai" version is far better in this regard. Music-wise, I think that the original score is much better than the american dub.