If you haven't heard of Spore yet, well take about an hour off of work and goto Youtube/GameTrailers/Google/Etc. and search for it. You'll be excited too! Basically, you create a creature from the ground up, from single cell roots to a fully mobile civilization, with complete customization along the way. There's a lot to be said about it but I'll leave that to the people that actually know what they're talking about. For me, the issue isn't if I'm going to buy Spore, it's whether I decide to make a race of Cloverfield monsters first or a race of Goro-esque four armed warriors. I'll let you know!
P.S. EA releases their Spore character creator to the public in June so the universe can be populated for launch. Maybe I'll make both!