The zelda windwaker soundtrack is the best for leveling It has such an adventure feel to it. When i was playing on ED this was my main soundtrack i just loved running through strangle thorn vale while listening to the first song in the sound track. Dat Flute Dat Lute Dat Fiddle
Honestly, for long periods of leveling, some Chillout music is the best, it puts you in a kind of relaxed trance and just blends into the background nicely. For pvp, something more upbeat of course. Here is a good 40 min video of chillout music.