You said we could also express our opinions on cartoons on TV, and so I shall. My favourite cartoons are all on Cartoon Network, and they are:
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Dexter's Laboratory is probably my all-time favourite cartoon. The first few seasons are HILARIOUSLY funny, nearly every episode of them. And there are many. But then, they switched the animation style and some of the voice actors, and the show became unfunny and uninteresting. But the original seasons still remain brilliantly hilarious works of cartooning. My favourite episodes are probably the one with the mechanical parrot ("Dexter's a cookie!"), the opera episode depicting the story of Dexter's birth, and the Mach 5 episode, in which everybody tooks extremely fast and have very long monologues. There are so many others that I love, though, such as the Muffin King episode, the Dodgeball episode, the James Bond episode, the Action Hank episode, and many more.
Samurai Jack, while lacking the brilliant comedy of previous Genndy Tartakovsky creations such as Dexter's Laboratory and The Powerpuff Girls, makes up for it with absolutely breathtaking visuals and design, awesome animation, and interesting and original plots, stories and ideas. Any fan of animation should check out this show. My favourite episodes: when Jack learns to jump good from the furry blue monkeys, Jack and the Scotsman with the machine gun leg, the Three Blind Archers episode, and the first episode with Demongo the soul collector.
Foster's Home for Imaginary Friends is a relatively new show, and it only has a handful of episodes, but what episodes it has showcase absolutely brilliant cartooning work. The characters are wonderfully designed and characterized, the animation style, achived mainly with Macromedia Flash, is smooth and wonderful to look at, and the episodes are interesting, original and brilliantly funny. Bloo might be one of my favourite animated character. I don't have a favourite episode, they're all equally charming and sweet.
Another show I occasionally enjoy is The Powerpuff Girls. While many of the episodes aren't that interesting, occasionally they come up with some absolutely BRILLIANT episodes. For example, the Beat-Alls episode is probably my favourite episode of any cartoon on TV. Other brilliant ones are when Miss Bellum is kidnapped (the entire episode is an homage to The Big Lebowski), the episode where Mojo Jojo has to babysit the girls ("If I were a rake I'd rake Rake RAKE!"), and a few others.