I haven't gotten past the first opening, which I like a lot. It's very catchy.
I don't like the ending tune as much, but it's growing on me.
I really like the first close. The words are haunting. The second and third closing are boring (second has some redeeming artwork, though) and I haven't decided about the fourth close yet.
So far, the third opening is the easiest to sing along with, but all the openings have been good!