Yeah, it's a weird pick. I really only like it because Chain of Memories was my favourite KH game and I associate the song entirely with my memories of it. It's not a particularly interesting or impressive song otherwise.
I feel the same way, though. The entire Chrono Cross soundtrack is like that for me. I've never played the game but its soundtrack is one of my absolute favourites. It's to the point where I'm almost scared to play it because I feel like if I do, I'll be disappointed that the songs don't match the kinds of scenes I've expected them to in my head all these years...