...I'm enjoying Spore.
Here's my first species from the point it first set foot on land, up to the point it gained full sentience and I moved to the next stage of the game which finalizes the look.
http://www.spore.com/sporepedia#qry=srch-ashral EDIT: The link above now contains a few buildings and vehicles I created for the first species, and the evolutionary path of a second species I created.