My cat Zorro is so weird. I've had a few cats in my lifetime but he is something else. It's like he's the cat version of Marley from the movie Marley & Me. Worst Cat Ever, but I love him like he's my child. He is my child. Here's just a few things he does that earn him this title.
The Drooling
My cat drools. Yes. In the morning at the first sign of life from anyone in the house, he hops up into their bed and demands to be petted while drooling everywhere. It's pretty gross. And it drips everywhere. 
The Chasing/Stalking
He follows us around, stalking our legs and waiting for the perfect opportunity to pounce on us. And when he does pounce, he will use teeth and claws against you. I have many scars on my legs from this. It's not fun.
The Bitting
When Zorro gets all snuggly and cuddly, it's just a cover for what's about to come. He's sitting in your lap, smushing his face into you, purring, maybe drooling, and then BAM! He bites you. Just holds on with his teeth. Sometimes he doesn't even bite, more just nibbles.  
Loosing Collars
My cat is allowed the joys of the outside world because we don't live on a busy street and because he would destroy the furniture in the house if he didn't get to climb trees and such. But he looses his collars! He is only a little over a year, and I've only had him for a year, but he's on his fourth collar. Yeah. And for a spoiled cat like Zorro, this can be expensive. Luckily his last collar I got on sale and is reflective so that he can go out at night. (I don't like it when he goes out at night because he's solid black and I can't see him) I do not know what he's doing out there... when he comes home without a collar on it's like seeing your kid walk in naked after you don't know where they've been. I know I'm slightly exaggerating but when you don't have kids your cat is just that big of a deal.
All in all? I love my cat. But he's mean, annoying, loud, demanding, and perfect. He even has the same hair and eye colour as me. :)