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.
One that actually gives you goosebumps: Anyone "photographed" by Camera Banki gets sent to the Junk World, where Uguts await in a secret facility to turn them into more Uguts.
Faceless Suto siblings. That's all.
Americans Hate Tingle: Some Western Toku fans hate Go-onger for its absurd wackiness and over-the-top slapstick comedy.
Awesome Music: A lot of tracks. Go-onger has a really nice soundtrack in general, but to specify:
Ear Worm: Once you hear the intro, you will never get it out of your heads. Ever.
Evil Is Sexy: Kegalesia. PERIOD: Deadly sexy? Check. Stripperific costume? Check. Dominatrix whip? Oh hell, check. The fact that her actress is a former AV*
"Piper" for Kegalesia. Because her pipe costume, and her actress' former AV career.
"Chicken Hopper" for Hiroto, whose actor played "Kamen Rider Kick Hopper" in Kamen Rider Kabuto; and because he pilots Toripter, a chicken mecha.
Fridge Brilliance: Why are the revived Banki from The Movie weaker than they originally were? Because they thrive on pollution, and they were recycled.
Villain Decay: As the series went on, the Gaiark Ministers are shown to be quite an odd bunch of fellows themselves, rather than the initial impression of "Evil Invaders from Another Dimension".
Happens very quickly with the Drill Banki from the Dino Engines' debut arc. He starts out capable of curbstomping all the Rangers, then promptly gets bitchslapped by the Dino Engines - by the next episode, one Ranger is enough to hold him off. And then the Dino train runs him over.
Hiramechimedes, first mentioned by Yogostein as Gaiark's sharpest mind, started as a genuinely threatening villain; he has a mecha more powerful then the Go-ongers' at that time, he has excellent predictivity, and the core five Engines are scared witless just by hearing his name because of the experience from prior encounters. The only threat to him was the Go-on Wings. But... his losing streak began really quickly after his appearance, starting with a small tactic of teamwork from Go-ongers, and it just went on all the way, even beyond the grave.