Why would I dedicate space in my brain to Mask of the Phantasm? A movie I will never see, ever.
Well, if you have any interest in Batman at all (and I would assume so considering you’re viewing and posting in this thread), I wouldn’t recommend never seeing it ever, as it is pretty good (and much better than the large majority of live action Batman films).
I don’t doubt it’s quality, but realistically I will never make time to watch it; even if I did plan on watching it, I would forget.