I began watching the show in 2016, and the first episode I watched was "Member Berries" when it aired live on TV in my motel room. Since then, I didn't skip a single episode. So here I'm gonna rate the seasons I watched live.
My 1st season: Season 20
I think that if it wasn't for the serialization of the show at that time, I would've never really gotten into the show in the first place. I found the first episode to be interesting, so I just kept going watching the show, and I found it fascinating, especially because it used humor to parody the elections and all that. Before watching "The Damned" I decided to learn more about the characters, and I was like, wow then how did Cartman become so defenseless when his devices got mauled? Then I figured, wow he might've matured or something but still gets scapegoated for his past actions which led him to being falsely framed as the infamous troll. I did not expect him to somehow get a girlfriend, but I admit it was a very good accessory to season 20. I think though that the season did rely on the election too much, because I was aware of the plot twist after "Fort Collins". However, I didn't find the ending to the season horrible, and I actually enjoyed it, I believe it's underrated and doesn't get enough credit. As I said, if it wasn't for the serialization, I would've probably never gotten into the show.
Rating: 19 out of 25
My 2nd season: Season 21
By then I knew the background of several characters and all, but it wasn't until mid-season that I decided to binge watch all the past 20-and-a-half seasons to see how far it's come. I was pretty amazed to be honest. To this day there's several remains of season 21, mostly from Phone Destroyer and Fractured but Whole (which I bought as soon as it came out), so it's evident that this may be one of the more iconic S.P. seasons. I personally enjoyed it too, except for the Cartman-Heidi arc, that one relationship - which really had potential mid-season 20 - went down the drain. On one hand, Cartman was more of his old nasty self. On the other hand, it wasn't funny that season, it was just cruel. At least he was pretty funny in the FBW game. Also, who knew this would be the last season of Randy being a fun and enjoyable character? This season brings nostalgia, even though I didn't really like the finale.
Rating: 18 out of 25
My 3rd season: Season 22
The first three episodes are a bit nostalgic since they're from the pre-Tegridy Farms era. After that, the season was a bit of a rollercoaster. We had Al Gore (whom I hated up until "Time to Get Cereal" when it was revealed he was right about MBP), we had ManBearPig causing havoc, and killing off one of the most iconic characters of the show (Satan), which was a bit depressing, especially since his death came a week after his SPPD card was released, we had Randy and his stupid farm (but I admit it helped poke fun at Amazon and Jeff Bezos, which was the sole upside of the arc), and we had the boys getting along very well, which was good. Overall though, I find the season bang average, but the finale was really good. Also, God knows where the hell Cartman's ex Heidi went ever since that season.
Rating: 13 out of 25
My 4th season: Season 23
Despite Randy turning into a complete asswipe that season, I really liked the episode "Band in China" but that was mostly because of Mickey Mouse, not Randy. Mickey really gave a representation of what Disney has become, and the fact that going as far as to sacrifice Winnie the Pooh (good thing he came back to haunt Randy) is something Disney would do if they want to continue production and gain money. My point here is, Randy really fell off. As for the kids, it was nice to see breakout characters like Strong Woman, Nichole and Scott Malkinson, who I think they deserve more screen time. Speaking of which, I really enjoyed "Basic Cable" and the introduction of Sophie. Also, I think that episode was Cartman's best performance since early season 20. Overall, I think this season marked the point of modernity. I would've enjoyed it more had it not been for Randy.
Rating: 15 out of 25
So those are my ratings, what do you guys think?