You have no idea what you're saying.
I don't see a logical story telling reason why Invader Zim would be in black and white....unless Jhonen wanted to make something akin to the cheesy Sci-Fi films of the 1950's, it could still work. Or, if he wanted to keep the same visual style and tone he had with JTHM and Squee (which are both in black and white) then it could work. But since that's not the case, it doesn't.
And Transformers...once again, I don't see any reason.
I'm not crapping on color. I'm just crapping on people crapping on black and white because it's not color. Color is fine.
But color is boring. You don't notice it because it's the norm. There's nothing wrong with it, but there's also nothing wrong with black and white either. It's a different format which now allows for a different kind of film, if you use it correctly.
Since the comic was in black and white, the show, for the fans, could be shown in black and white. Because of the material it was based off of.
The creators of the Walking Dead chose that format to make their comics in. Just like directors chose color to make their films or TV shows in.