These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dick: "Nina please, we're talking about prejudice here, something you know nothing about." Nina: "I'm black." Dick: "Oh, right." *grabs a Post-It note and begins writing* "Nina...is...black." *slaps the note on her chest and turns back around*
Crowning Moment of Funny: No doubt numerous, but in particular, in the series finale, when Dick tells Mary to think back on all their experiences together, with the perspective that he is an alien, she plays out a symphony of emotions, running the gamut from heartwarming joy to nauseated disgust to sheer terror, forming a glorious summation of the entire series.
Genius Bonus: During one episode, Dick comments that Easter Island was a practical joke that got out of hand. Many listeners will simply associate this joke with the massive stone heads and laugh, but a person who has read about the ecological and societal collapse resulting from overuse of natural resources due to moai construction will understand the "got out of hand" differently.
Trying to blend in as a human physics professor means Dick does equal parts Genius Bonus and alien Techno Babble, like "grading on a transient loop".
Harry ran for the Rutherford City Council district 9, in "Dick The Vote".
Idiot Plot: There are numerous plots where the problems/misunderstandings would be solved quickly if only some more specific language was used. Of course, if that was the case, things wouldn't be nearly as funny. It also should be mentioned that the idiot plot is justified for this show, since the Solomons are learning Earth culture and of course wouldn't know about many facets of humanity.
Every time Tommy appears on screen, it's hard to restrain yourself from screaming (in a high-pitched voice) "COOOBRAAA!!!".
The Scrappy: Tommy's first girlfriend, August. Manipulative, selfish, snooty, Straw Feminist and all-around bitch who broke up with Tommy due to his "immaturity", after being caught cheating on him and lying about it to his face.
Strawman Has a Point: When Dick is called for jury duty, he's entirely gung-ho about the process until he learns the defendant is someone he's met. The case is iron clad and he's completely guilty and Dick knows it, but Dick can't bear to send someone he knows to jail, and have him know Dick in turn. Dick even uses the words "now he has a face" to explain why it bothers him. He's still an idiot, but he sees the defendant as a person and not just a criminal to be convicted.
Legally, he should have been excused from the case anyway, since no one in the jury is supposed to know anyone involved in the case.