Besides taking a brief break from playing/GMing, I'd HIGHLY recommend changing genres.
Sounds like you've done the fantasy thing for quite a while... try some cyberpunk or historical fiction. Find out what your group likes besides fantasy (in film, books, etc) and play it!
I'm getting ready to run Savage Worlds because our group is burned out on fantasy (been doing Pathfinder for a while now) and we're going with Sundered Skies. Yes, it's still fantasy, but it's darker and has skyships. The rules change will be drastic, too, so the pace will change and it'll be a breath of fresh air.
Good luck!