- Genius Bonus: When Data bursts into hysterical laughter after receiving Q's "going-away present" at the end of the episode, the entire crew is baffled by it- except Troi, who smiles. When an android is capable of feeling genuine emotions, Troi can sense them, so she can tell Data is reacting to feelings of mirth.
- Hilarious in Hindsight: After being rendered mortal, during his check-up with Dr. Crusher, Q snarks that he's "been under a lot of pressure, family problems". Ironically, Q would later start a family during his appearances on Voyager, where his son proved to be as much trouble as he was!
- Jerkass Woobie: Q is as obnoxious and selfish as ever, and he's also intensely whiny about losing his powers and being forced to live out a mortal life as a human, but his usual arrogance and amorality have slipped. He really does hate and fear being mortal, and he believes he is so out-of-touch with humans that he is incapable of living as one; depending on your Alternative Character Interpretation, either he would rather die than face life as a human, or he chooses to perform a Heroic Sacrifice because he sees his life as having no value.
- Memetic Mutation: Picard's reaction to Q picking the Enterprise for refuge has become the Trope Codifier for Facepalms.
YMMV / Star Trek: The Next Generation S3E13 "Deja Q"