My cats are pretty interesting. We have two, a big, brown one, named Simba, and a smaller white/black one named Snickers. We got Simba a year or two before Snickers, and he was our first cat.
One day, shortly after we got Simba, my sister got a slice of chocolate cake. She set it on the living room table and went back into the kitchen to get a fork. She came back and it was gone! Then we see Simba running with a whole slice of chocolate cake in his mouth. Keep in mind, he was just a little kitten. That was a sight to see! But anyway, we knew chocolate isn't good for cats so we went to get it from him. He made the strangest noise I've ever heard come out of a cat. He was growling! I never knew housecats could do that. Since then, we've gotten Snickers, and I've never heard him growl. Maybe only certain breeds can growl?
Anyway, we also discovered that Simba will actually play fetch. I don't mean just run down and catch a piece of string, I mean he'll run down the hallway to get a ball you throw, bring it back in his mouth, set it next to you, and wait for you to throw it again. I don't know how many cats do this, but I saw a special on Animal Planet about cats one day and it was talking about certain breeds that will play fetch. That explains it.
Simba's not a very sociable cat, ever since we got Snickers, it's easy to tell. However, he does some weird things. Like, when we pour food into the bowl, Simba will not eat until Snickers eats, ever.
The cats used to wrestle with each other, they don't do it anymore. Before you jump on me and call me a bad owner, keep in mind they were just playing. If at any point I thought they were getting mad with each other, I would break them up. Also, they never got hurt from this, so it's not a problem.
Here's a link to a picture, it's too big and I don't have time to resize it:
http://yfrog.com/m9fightingarlin2j