I've had my cat Kiernan for about a month now, I inherited him from my mother who couldn't deal with 2 cats and an old dog all at the same time. He's not quite two and he's really, really active.
He's actually like a dog -- he plays fetch (better than any of my dogs ever did -- he brings it back!), he greets me when I come in the door, he runs to the door like a watchcat when someone knocks (most cats run away), and he follows me
everywhere -- he's at my heels no matter where I am.
This is his "house"; a $6.99 nylon cube that has gotten more action than any of his other toys, as evidenced by the bite marks.
And here's the best: the other day I walked into the back bathroom while he was peeing, and I found out that he stands up against the wall while he's going! What a man!