Don't get me wrong, i really liked the game and am playing through again. I just made the mistake of saving in the final room before you make your choice, so I couldn't play anymore. I won't make that mistake this time. :)
I just didn't think the main story was long enough, considering you have to play through 2/3 of the short main story to get the power armor, and then you can't play after the end.
Fact: Earthbound is the greatest game ever made