As the others said, there's still a lot of content to be had. There's still a lot of fun and !!FUN!! still. I'll be interested to hear your take on the game, too, since I've always liked comparing opinions on these sorts of things.
As for me, I just finished Sharin no Kuni, Himawari no Shoujo. Pretty good, definitely want to play the fandisc at some point.
Sharin No Kuni Spoiler
Next, I think I'll relax a little and play some Kamidori. Out of interest, how strong does the Kamidori storyline get? I'm only on chapter 3 (and the routes haven't diverged yet) so I was just interested,