Best fight: Gintoki vs Takasugi
This fight had an epic buildup and the payoff was definitely worth it. Also, the animation is pretty good and the voice acting is THE best voice acting that I've ever heard.
Worst Fight: It's hard to pick a worst fight. If it's a bad fight, it wont stand out to me.
Overrated fight: Jotaro vs Dio
It wasn't bad, but it wasn't the greatest. The fact that many people go into JoJo thinking it's the peak of JoJo is what causes it to be overrated. There are so much better fights within the series and even in part 3.
Underrated fight: Made in he