The name Sherlock Holmes is famous around the world. I was very young when I first heard of those stories, but my first introduction was from the 2009 movie Sherlock Holmes, where Sherlock was portrayed by Robert Downey Jr., and the sequel A Game of Shadows released a few years after. In these movies, Sherlock is portrayed as a highly unbalanced individual with an indescribable level of knowledge and talent in seemingly every field of industry, science, or art which he utilizes in his investigations. Both of these factors make Sherlock Holmes nearly inaccessible, in a personable sense, from the rest of the world, Watson being the only bridge between the two.
In the series Sherlock which aired in 2010, the talents and personality of this Sherlock Holmes, as portrayed by Benedict Cumberbatch, would make Robert Downey Jr.’s Sherlock look like an average, down-to-earth guy in comparison. I enjoyed watching the series, but I recognized it was highly fictionalized in terms of Sherlock’s capabilities, the paradoxical complexity and simplicity of the cases, and the scale of difference between Sherlock, Moriarty, Mycroft, and the rest of the world.
The original Sherlock Holmes, written in the late 1800s, is much more realistic. Sherlock Holmes is still portrayed as a genius, but his level of genius is realistic to what could be expected of an actual genius level individual, if not slightly beyond. I consider it akin to the difference between Captain America in the original comics, where his abilities are slightly beyond human capabilities, and the MCU, where he can keep a helicopter grounded by holding it with one hand while he grips a railing with another. I believe that this allows the reader to learn by example from these stories; since this more-realistic Sherlock Holmes solves cases via more-realistic means, the reader might actually glean some small insight into the reasoning process that they may have otherwise lacked, just as a benefit of reading these stories. More importantly, their ability to follow along with this more-realistic, yet still larger-than-life character will make the adventure that much more enjoyable.