I currently enjoy Treespeak in the Western Black Shroud, I like the height (along with a general enjoyment of the Black Shroud), as well as being able to look at any people wandering about below in the Emerald Moss area. The Goblins had me worried for a while, but they are friendly enough and it always amuses me to see folk chopping down the Goblins when I am out and about.

Have to second Coerthas for the music, only thing that keeps me away from there is that I base camp in Gridania, and don't really Teleport around, so it needs to be within walking distance. Love the wind effects out there though, awesome.