Endless Ocean is really fun! I didn't keep up on it (I should go back to it) but one of my favorite little touches was how you could import your own music to explore to :^) This also reminds me that I recently downloaded Aquanaut's Holiday as well! I'll probably make a post about it when I play it.

Chrono Cross isn't a game I've played, but I did manage to grab the music selection when it came out and I listened to it a lot. It always had a really lovely and mysterious feel to me...I should definitely try it sometime.