Interesting question, and I'll bet the answer is never the same for any two people. That's the beauty of this site - the huge diversity in members, combined with the nearly overwhelming amount of creatures, with so many different ways to play, it's always fun!
I chose 'Collect all existing creatures' and 'Just take care of my creatures without purpose other than to make them happy', because those are my main goals. For one, I love collecting - especially pretty creatures! The artwork here is amazing, and gets better every month. And making my creatures happy..... well, because I'm a nurturer. Even if they're virtual pixels, to me, they deserve to be spoiled
I enjoy the forums too, just not as much as I do the creatures. Maybe because there aren't many active players on the international boards? You kind of run out of things to talk about after awhile, when it's the same group of people all the time. It's a natural occurence even in real life, so it's not a bad thing, just a fact. I love all the people I've met here - everyone is wonderful! It's just that after awhile, even word games get tedious, so I find myself turning away for a time, before I'm interested enough to peek at the games again.