"Your timing is off."
"My timing is digital."
Now THAT was a funny line. Plus, I love Data's response to Guinan, "Maybe it was not funny."
That one had me in stitches, because as much as I love Guinan, I wholly agree with Data.
Then there was the quick seduction of the transporter officer and the subsequent trip to her quarters. The first time I saw that episode as an adult, and understood what just happened, all I could think was "you magnificent bastard".