I really liked FFXI's music, but I've always enjoyed Nobuo Uematsu's music as well. I'm anxious to see what he can come up with. Personally, I'm really looking forward to some beautiful piano compositions.
I do agree with Yeargdribble, though: I think Nobuo Uematsu overseeing all compositions as opposed to writing them all himself may be for the best.
How do you feel about the two pieces of music that have been released thus far (the one in the E3 trailer and the background music on the official site)? You can download/stream them from http://www.ff14site.com/media/music/index.php if you'd like. I think they sound wonderful.
I'm looking forward to seeing what Nobuo comes up with!