I like DC cartoons and both of the ones I've been following at present are great. I do feel they overdo Batman a bit which limits their ability to explore other heroes. Nonetheless, I've really liked Young Justice...
Spoiler for newest ep that got pulled from CN:
did anyone catch the episode that was pulled on itunes? Black Beetle is a badass!
I am speculating that Miss Martian's mind rape of Aqualad might make him forget his true allegiance and become the double agent that they foreshadowed in the last episode. They also teased us pretty heavily with the character I'm assuming to be Virgil or Static Shock. I was never too into that show, but would be excited to see him in action regardless.
Green Lantern was a completely unexpected fun choice; it's more lighthearted I feel, but the 3D animation always works well for the setting and the animation of the power rings (in my opinion) and I really liked the initial story arc. Again, the episode they pulled recently from Cartoon Network was really fun to watch with a really weird and funny cameo/easter egg of Nigel Thornberry from that goofy cartoon The Wild Thornberries.
DC has put out better animation over the years, but there's also been some great shows from Marvel. Some of my favorites are 90's X-men, 90's Spiderman, Wolverine and the X-Men, and Avenger's: Earth's Mightiest Heroes. I think EMH is the most fun superhero animation I've ever seen, but that's mainly because I really like some of those characters (Iron Man, Thor, Hulk, Black Panther are all great) even more than the ones on DC's Justice League, which I will say was also extremely enjoyable and definitely the more polished product, regardless of my personal preference.