This one was interesting. I was originally going to go with a minor feel for the "rock metal" effect but I found that a major key (D major to be specific) fit the song much much better.
I had a lot of fun with this one. I think the acoustic on the 3 verses added a euphoric feel to it. With the distorted chorus a more heavy intense sound. There is a few places where the minor key of the original song contrasts my major key, but It's not that big to notice unless your really musically trained.