I don't think the problem is the Tom Cruise picture. You're making an irrelevant post in a thread that was made to discuss people's decks. This is something that would instead go in the Off-Topic forums. It's usually fine if you occasionally post something off-topic (I do it too). If you have any more questions about stuff, send me a private message.
Now to get back on-topic, I think I've finally figured out what a pet deck is. It is the deck that you decided is your favorite deck, no matter how irrational that decision is. I can't really decide what mine is. As I said before, I like all of them. Decks I don't like get taken apart. I guess right now my favorite would be
Vaevictis Asmadi, the Dire, because it was a very hard build, and I'm constantly having to make small adjustments to get everything to work.