Morphing Jar Cause my friends keep using that when i have an awesome hand. I wouldn't mind having 1 though...
Hino-Kagu-Tsuchi since Patrick uses it when i have a pwnsome hand and then i can't get revenge cause it goes back to his hand.
Exiled Force was my least fave card since Anirudh used it with Reinforcement of the Army to kill my Tyrant Dragon and my Creator. But now i like it a bit better since i have 1.