Finished Hajime no Ippo. I thought that the third season was incredibly poor. Ippo's main antagonist was very similar to Bryan Hawk from the previous season, and Hawk was as cartoonish as it is possible to be. Takamura's fight with Eagle was quite good though, but not as good as main fights in the previous seasons.
They also went full politics in the last 4 episodes. We get it, Japan is a fantastic place (so, please for the love of Shinto, don't make Volg say it 100 times the next time we see him) and that a Japanese boxer defeated an evil American one.
The second season was the best in my opinion, with Date Eiji - Ricardo Martinez being the best overall fight in the serie (Eiji-Ippo and Takamura-Hawk being runner ups).
I just saw that the anime has reached only half of the story that it is given on the manga. Still no words for a fourth season, but the tempo of the anime is quite slow so I guess that there are needed 2-3 seasons to reach the point when the manga is.