I'm pretty sure most people found it interesting the first couple of hours, posted their glowing reactions to it, then only realized how shitty it is a couple hours later.

As a game, Spore just sucks. As a creature creator, it is rather flashy and interesting. But really, the only parts of the game that seem to have been well-developed are the creature design tools, the brief introductory microbial stage, and the galaxy generator. The other parts of the game, including the other design tools, are either just shallow and repetitive with no replay value at all, are ridiculously easy, or were obviously added to the game as an afterthought.