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.
Angst? What Angst?: For a guy who is supposedly obsessed with saving his wife from her Fate Worse than Death, Zachary Foxx spends most of the show going about his business with a just-another-day-at-the-office-attitude, with just about everyone from Zachary to the show's own writers forgetting about the subplot of his wife.
Awesome Music: The soundtrack is a combination of prog-rock and AOR, was cooked up by the guy who went on to do The 4400 and the 90's incarnation of The Outer Limits. Cult bands FM and Refugee sang tracks on it, and when Koch asked what extras should be on the DVD, the unanimous vote was for a soundtrack.
Bizarro Episode: Some people dislike "Mothmoose", and any episode featuring Buzzwang, because their comedic tone clashes with the straight adventure episodes favored by fans. Also, "Mothmoose" doesn't feature any of the Rangers—the heroes are Zach's children and the Kiwi Kids.
Which is lampshaded by Commander Walsh explaining that the Rangers aren't available.
Cargo Ship: Wildfire seems a little bit more affectionate towards his ship's AI than normal.
Complete Monster: The Queen of the Crowns starts off by ambushing Kirwin, and putting a heavy bounty on humans to every two-bit thug in the galaxy. We find out why - she's mashing the humans down for Life Energy to power constructs through which she can see, hear, and administer her Empire. It's not only an exceedingly painful process, but the poor bastard is fully awake and aware of what's happened. We also see that she slaughtered millions on the planet of Tortuna, leaving a few, domed cities behind in a lot of wasteland. She also was hunting humans because the last race she used to power Slaverlords has been hunted to near-extinction and she needed replacements. If that wasn't bad enough, she enslaves an entire planet, making the inhabitants work in concentration camp conditions to build a massive hyperspace cannon she uses to blow a chunk out of Earth's moon, threatening to do worse to Earth unless they gave her 5000 humans in tribute. On a personal level, she uses the only psychocrystal she's made from a human (Zach'swife) to commit Mind Rape nightly on both of them. Her voice actress in the American version unfortunately sounds like a cross of Ming the Merciless and Maleneficent. The German actress comes across as far more menacing.
Ear Worm: The theme song will get stuck in your head.
Ensemble Darkhorse: As Mandell put it, he intended Zach to be the protagonist, but then "Along came Goose."
Fanon: Because the series is rather obscure, there are only a handful of fanfic writers, many of who work or have worked collaboratively. As a result, there are several elements (such as a "surname" for Niko) that keep showing up.
Foe Yay: The evil Queen of the Crown, albeit one-sided on her part, towards Zachary. Even Word of God commented there was some S&M vibes in how she was gloating towards him.
When Chris Rowley was watching a marathon put on at a small sci-fi convention, he called out "Oh, Buzzwang, we wanted to kill him so badly." The rest of the audience said (almost in unison) "So did we!"
They Wasted a Perfectly Good Plot: The subplot regarding the Fate Worse than Death for Eliza Foxx, wife of Zachary Foxx, is often glossed over to the point of being pretty much forgotten by everyone in the show, including Zachary himself. When one learns that Nico had a crush on him some episodes later you're tempted to wonder why he didn't go after her... until you remember that he is in fact married.
What Do You Mean, It's for Kids?: Genocide, on-screen death, a Dating Catwoman (or at least shagging her) situation in "Renegade Rangers," slavery, torture, massive aversions of Never Say "Die" (with the on-screen body count to back it up)... even Mandell admits the show's writing "flew over the heads of six year olds."