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.
YMMV: The Secret Saturdays
Complete Monster: V.V. (Vincent Vladislav) Argost is the Faux Affably Evil nemesis of the Saturday family and, in actuality, a cryptid himself. As the Himalayan Yeti, Argost murdered people for pleasure, preying upon the humans who wandered through the mountains and taking "souvenirs" off their bodies. Two of his victims were Drew and Doyle Saturdays' parents. When confronted with this, Argost only says he can't be bothered to remember all of the people he's killed. Throughout the series, Argost was obsessed with finding Kur, a god who had the power to control all cryptids. Eventually, Argost discovered that Zak Saturday was Kur himself, and so Argost began plotting to steal the boy's power. Eventually Argost managed to succeed in this by draining the god power out of Zak Monday, the evil alternate dimension counterpart of Zak Saturday; this had the side effect of killing the boy. With his newfound powers, Argost ordered his cryptid army to wage war against every major human capital city, with the ultimate goal to Kill All Humans and rule all cryptids. Though already possessing a god's power, Argost craved more power still, and so he killed Zak Saturday to drain his power as well, just as he did to Monday. Ever the showman, Argost took to committing atrocities with a theatrical flourish and dry humor, relishing the screams of his victims and considering the destruction of mankind as just another one of his grand performances.
Creator Worship: Jay Stephens receives TONS of this as an active member of the Toon Zone forums.
Ensemble Darkhorse: Doyle. It's generally agreed that his addition to the team was a welcomed improvement for the show.
Evil Is Cool: V.V. Argost, Van Rook, and a large number of the other villains.
Genius Bonus: The number of obscure cryptids in the series. How many of you have ever heard of the Tapire-iauara or the Orang pendek?
Growing the Beard: The show, already good, improved a lot when Doyle joined the team.
Idiot Plot: When the Secret Scientists took the Kur Stone away from Argost 11 years prior to the start of the show, why didn't they smash it into a fine powder so that Argost could never possibly recover the thing, instead of just breaking into three pieces to hide?
Magnificent Bastard: V.V. Argost. A man who oozes charisma and actually manages to come out ahead of the heroes in multiple episodes.
So Okay, It's Average: the show is just okay in general: its high points being great dialogue (almost always from Zak, Doyle, or Fiskerton) and creativity while its low points are its somewhat limited animation and slow character development. Season 2 is definitely an improvement but it still hasn't quite grabbed the viewers' attention.