Domino another one of Wendys3-dcats.blogspot.com, is definitely not scratching furniture in this photo, but if she was it would only be a natural gesture. Cats scratch not only because they are genetically designed to, but also because it feels good on their claws.
Daisythecurlycat.com's Harley is playing with his owner, but may be a bit irritated that he's not winning! Kitty ears that are folded in a similar fashion as Harley's usually mean that they are feeling some irritability.
Moses from Backalleysoapbox.wordpress.com is taking a nap from his busy adventures with his owner! Knowing that she is near by, he is more likely to take a snooze but will ensure to still be alert in case he needs to protect her.