I just joined this site last night, and I love it so far. 

You acquire, breed, battle and train pets (the art is amazing). You can also have a human avatar. The interface is intuitice and unique and incorporates lots of Roleplay. I very much enjoy the fact that you can have an "occupation" on site and get a salary each day- a very neat concept. 

Anyway, I don't know much about the site besides how awesome it is, so please come check it out!

I'll add more info when I learn more.

http://www.leayph.com/index.php?referral=766

CLICK

Some pet examples (taken from their front page)