Dislike for 4e's has not driven me to something else, but its movement towards higher power is making me look for a second fantasy game to meet other fantasy needs. I like 4e, and think it is a great successor to 3e, superior in most ways, and I like it's vibe and feel. But, that said, I think its changes make it a harder to play something a bit grittier, and I like more than one kind of fantasy.
So, I recently ordered a dozen Warhammer 2e books to scratch that particular itch.
Otherwise, my group has often played other games. Mage, Vampire, Mutants & Masterminds—and until the guy who liked it moved away—Savage Worlds, plus a variety of others in the past