I think Nobuo Uematsu's quality of work has degraded. There were only a few songs from FFX that I thought were particularly good compared to the older FFs, and a lot of them were done by the other composers.
At the moment, my favourite composer is Yoko Kanno. I've heard her music from Cowboy Bebop, GitS: SAC, and some other stuff, and she's amazing. What's great about her is that not only is she a great composer, she's capable of writing great music in any genre, AFAIK. I've heard her techno, jazz, pop, orchestral, the rest, and I've loved it all.
This may be a little off topic, but has anyone listened to much Bjork? I've always thought she was just some wierdo, but I recently listened to some of her stuff and she's amazing! I suggest you listen to Joga, Isobel, and Hunter.
Shoot, I went a bit off topic there. This isn't exactly about video game music, more anime. Oh well, if it carries on like this I suggest it be moved to the Completely Unrelated forum.