I just realized that I'm probably a certified geek having seen them all.
Edit:
btw, I deliberately left out Mask of the Phantasm and Batman & Mr Freeze's "Sub Zero" because they were part of the Batman TAS's universe, basically spin offs of that show and not original films in their own right. Both are classics tho and probably shyt on this entire list....so to even the playing field they were omitted. Gotham Knight was also left out because it's a collection of animated shorts and not a full length film



Edit:
btw, I deliberately left out Mask of the Phantasm and Batman & Mr Freeze's "Sub Zero" because they were part of the Batman TAS's universe, basically spin offs of that show and not original films in their own right. Both are classics tho and probably shyt on this entire list....so to even the playing field they were omitted. Gotham Knight was also left out because it's a collection of animated shorts and not a full length film