Phineas and Ferb: I more or less grew up on this show. I remember when the first episode aired, and I was there for that... or at least I think I was, I can't remember. Anyway, I was hooked on the show for a long time, and I don't think I missed new episodes airing on Fridays. I remember seeing the ad for it on Disney Channel, and I saw that it was premiering at 7. I thought that it meant that it was premiering in the morning, so I asked my mom if I could stay at home to watch it instead of going to school. She told me no, but then I realized that it was gonna be at night. I also recall having a dream that their was gonna be a movie, and not too long after, it was announced that there was gonna be a movie, and I was super hyped. Overall, I have fond memories of Phineas and Ferb. I haven't seen Milo Murphy's Law, but I hear that it's really good, too.
JoJo's Bizarre Adventure: I didn't initially watch it on TV, but it's watchable on TV, so it counts as a TV show. I was hanging out with a friend one night a few years ago, and he said he had wanted to show me an anime that he thought that I would like. I did end up liking it (a lot), and I went ahead and binge-watched the rest of the series until I had caught up, and I've been watching the show ever since. I absolutely love seeing the genealogy of the Joestar family and how it switches protagonists each time. It's what I think makes the series stand out so much, apart from the endless memes that it's spawned. It's consistent inconsistencies are what make the show so memorable.
The Suite Life of Zack and Cody: This is mainly just nostalgia, but this show was great. If there was a definitive Disney Channel show, I think that this would be it. It's the only one that I can consistently remember (other than Phineas and Ferb), and it's the only one that I quote on an almost daily basis. Mr. Moseby is the greatest character in anything ever, and you can't convince me otherwise.
I have more shows, but it would be mostly anime, so I'll save that for another time.