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: Doc Savage
Marty Stu: Doc has some characteristics of this, being a perfect physical specimen, incredibly brilliant, unbelievably badass and so on, and so forth. But he's hopelessly inept with women.
Fridge Logic: Didn't Adolf Hitler in disguise hit on you at the start of this adventure?
Older Than They Think: Doc's Arctic "Fortress Of Solitude". While it may appear to be a rip-off of Superman's, it is lifted, name and location included, from the very first Doc Savage story, published in 1933. Supes first got his retreat hang-out in 1938, it was located in a mountain cave outside of Metropolis, and it was called his "Secret Citadel". The Arctic version and the name "Fortress of Solitude" wasn't used in the Superman stories until 1958.
Values Dissonance: The "Crime College", where captured crooks are given brain surgery to wipe out criminal impulses and retrained into productive law-abiding citizens, leaves a bad taste in the mouths of many modern readers. Some later authors have even suggested that Doc was lobotomising the crooks.
A prime example of Science Marches On. At the time the books were written, it was commonly believed, including by psychologists and neurologists, that career criminals suffered from a treatable malformation of the brain.