Angel Beats! was definitely the best anime I've seen this year so far, perhaps one of the best I've ever seen. I'll admit it, I shed many tears throughout the series.
With ongoing manga, and a special episode bundled in the final Japanese DVD release (December 22nd), there's still plenty more going on with this popular series. I, for one, am definitely up for a second season if the rumours prove to be true.
Maybe they'll be going deeper into the story of the creator of the Angel Player? I guess we'll have to wait and see.