over a year ago:
avatar2012 is correct though. #3 is incorrect, it was in no way one of the reasons Nickelodeon cancelled Invader Zim. Also...it was CANCELLED, so no "Jhonen quit" no just plain and simple cancelled.
Oh and gays watch Invader Zim too...
Invader Zim ended at a good point. If it dragged out it wouldn't even have half the cult following it has today. A lot of shows can go on for season after season but that doesn't mean it'll kepp the same great consitency, a lot get worse as time goes on.
Also it wasn't the fault of Spongebob coming onto the scene. They could have easily squeezed that in with everything else like they do now. A great way to live the Invader Zim memories and everything is just buy the DVD's, too simple.