Well I will sum it up like this without giving spoilers.
Prince of Tennis occasionally gives us glimpses of the show it should have been and often doesn't understand why people like it.
Some of the most exciting matches were the ones that used special moves the least where the actual maneuvering and playing of the game was the focus with less speed lines. Where the match was alive.
While the worst matches were the ones that threw out all the concept of Tennis even existing and just threw a bunch of special effects on the screen. (And yet this is what the creators seem to think we wanted the entire time)
Some of the best matches were one where characters were constantly on the move to try to circumvent the special tactics and abilities of the opponent while they did the same. Making it an intense battle.
While some of the worst ones were when a character just spams their unstoppable winning move the whole time and wins the match. It may be cool once or twice but it sure gets dull.
Some of the best character moments were when they remembered someone was part of the team and showed their evolution along with that of their team.
Some of their worst character moments was when they threw the whole team aspect away and over used their big unstoppable characters or threw away what was developing characters for it. Heck a lot of the team had some semblance of understanding the full scope of the game but they threw it away (Inui for example, the show always hinted that he may be a better player then he lets himself be... Yet that never comes to fruition)
It will erase, change, and do anything it wants to characters in order to facilitate the situation. Often giving characters complexes they didn't have before, altering their skills before the match, or even giving them abilities they don't have... For the sake of tension with no care as to what it does to the show.
Prince of Tennis is a very mixed bag, in all 200+ episodes you only got a handful of honestly good episodes and there may be less then 10 honestly great fights. It cuts so many costs that most battles are still frames.
As well it suffers from what I will call Yakkate Japan Syndrome in that the closer to the last episode it gets, the more the series just seems to devolve.
I've watched the series in large chunks (I probably spent less then 2 weeks to watch the entire series in total) and I can just say don't do that. Break the show up.