Here's a simple question:
When did it become popular to call "Earthbound" by its Japanese title, "Mother"?
I've never heard anyone call it "Mother" seriously before, but ever since the next of the series was spotlighted, nobody calls it "Earthbound". It's "Mother".
My preference is "Earthbound". Not only is it a really solid-sounding name that's fun to say, it doesn't make me think: "RETRIEVE XENOMORPH SPECIMEN. CREW EXPENDABLE."
That said, I'm really jazzed about Mother 3.