I still play it on occasion. But I never actually play any stages and just stick to the editors. I still love the novelty of creating adventures in Spore, but I wish GA could let you do more.
There is the BetterSpore Mods out there. That project pretty much died, but the latest version (1.5) has a ton of tweeks for the gameplay that make it a little more enjoyable. I find, though, that the mods tend to prevent you from sharing certain creations. But I think it only affects creatures with parts from Cute&Creepy.