I did like the orchestrated version of Suteki da Ne better than any of the ones on the poll. However, if I had to pick, it would be Other World.
One-Winged Angel is good, but it's getting to be on my nerves...so many FF fans play it nonstop (including some of my friends who are gamers), and I am totally drawn off by fanboys.
Eyes On Me was so incredibly annoying. Mostly because I hated Rinoa and her theme when it came on during the game.
Melodies of Life was okay...nothing really special about it, IMO.
All the music in X-2...I didn't like it enough to make much note of the songs in it.
The Chocobo Racing one...hmm Chocobo songs/themes don't really impress me too much, but I think I like this Chocobo theme better.
I agree with the people who have said that the Japanese version of Simple and Clean was better. It had a little more substance than the English one.
So, yeah...I voted for Other World.