I watched all of Season 1,2,3, and parts of 4 as they aired in the US channels.
Season One was cute, Two was slightly weak, Three was just mind-blowing with the storyline and Four was too weird for me with the kids becoming digimons themselves. My favorite being season Three, I think the plot was a lot deeper than most little kids would understand. I’m thinking the creators wanted to either re-target their audience or go along with their aging audience. I’d take Digimon over Pokemon any day.
Season 1- 8.5 / Season 2- 7.8 / Season 3- 9.0 / Season 4- 7.6