I played EarthBound first because I was a 4 when it came out and so I could barely read at that time, let alone read magazines that had blurbs about MOTHER/EB0 on the NES.
I discovered EB0 at some point long before MOTHER3 was even announced for the GBA, but I had never actually played through it.
And I began M3 the day the patch came out, stopped. Then started a new game one day, stopped again in chapter 4 or 5. Picked it back up several months ago and stopped at the beginning of Chapter 8. Something always gets in the way of me finishing that game. I think the last time is me not wanting it to end though.
At some point after I finish M3, I'm, going to play through EB0 in its entirety. That's #1 on my bucket list.