I followed through with my decision and, surprisingly, quickly finished Kingdom Hearts II. Sora's level was in the seventies, so I guess that's why. The ending was long -- too long -- but enjoyable, with the final scene hinting of another sequel.
So, I'm going to take a break from gaming before starting my next game -- Final Fantasy X-2. I need to finish this game before getting Final Fantasy XII. This will be the fifth or sixth time I've started this game. The last time, I got to a great part of the story, but circumstances (aka work) pulled me away from it. So, back to Chapter One.