You know you're addicted to Spore when,
 

You try to sell herbal spices for 5 grand a packet,

You visit neighbouring houses and are disappointed when they haven't made any spice,

You sing to any animal you see to try and make them your friends,

Continue it!

You actually bother to play the game any more after reaching the centre of the galaxy and thinking "This is it?!"

I myself am still enjoying Spore. Although I havent actually played much of the game itself yet due to one thing and another, I have enjoyed what Ive played.

Tribe stage is great but hard. 2 very efficient groups of vicious buggers right near me, and I have no idea how to make tamed animals attack them or how to get my allies to help fight with me. Or if that is even possible. Still, its a fun challenge.