HAPPY 7th BIRTHDAY!!!
Haha, it's been forever since I've drawn on CS; and I know, I suck at a mouse. But at least I tried.
I think what I love most about CS, is the pets! There are so many, with their own looks and feel. You can dress them up, create a personality and a back story with them. They can inspire you, to use as a character in a roleplay or story, or be your fusona! So, the pets are what I love most. (Of course, I appreciate and thank the artists whom make these pets real so that we can enjoy them. )
Ref for the bunny- I drew him since he was my first, and one of my favorite, pet ever.