I honestly think its one of the best series out there, and that even though its really old and gets worse after Chorus, it still tops multiple series that are being produced today.
(i only watched from season 6 to 13 because i was told those were the best seasons, but i DO have some knowledge of the earlier and later on seasons)

My favourite characters have to be:
Caboose, Sarge, Donut and Dr.Emily Grey, because of how funny they can be
and Locus, because of how well written of a character he is, he's genuinely so scary and badass at the same time, plus his voice is fantastic (although the Voice acting in the show is awesome in general)

My favourite ARC of the show is a tie between the Freelancer Saga (season 9-10) and the Chorus Trilogy (season 11-12-13)

and My favourite fights are the one where Washington+the reds and blues fight the META back in the earlier seasons and the Felix vs Everyone fight in season 13

The humor of the series is on point and literaly has the funniest jokes i ever had the pleasure of hearing

The soundtrack bangs and never gets tiring to listen to no matter how many times they use it

Please go give the series a shot if you havent watched it yet, its worth it!