The "WTF?" look on Q's face right after Sisko decked him.
Q: You hit me! Picard never hit me!
Sisko: I'm not Picard!
And Q never returned to DS9. In the Q Continuum books, he said it was because DS9 was pretty dull. He even conjured a modle of the station and "docked" a burrito on one of the pylons. Picard actually considered punching him too.
Originally Posted by Yang Xiao Long
At least you two have something that drives you. I've just always, gone with the flow, you know.