"The detective story mixes very badly with different genres. The moment you start adding romantic subplots, overly long descriptions, deep psychological analyses, long social conversations and such stuff into the detective story, you will inevitably dilute.."
I kind of get what you're saying- don't mix jane austen with sir aurthur conan doyle because it will draw it out and make it boring. However its important to note, there are romantic and character aspects in the show. I think it's the relationship between Sherlock and Watson (which I consider romance), their conversations and psychology, that makes the show a real hit. The detective component is entertaining,but it's the human element that makes it meaningful.
"And of course, if your detective is madly in love, his deductions or investigation will stand in the shadow of that and once again, the detective part of your story will suffer because of that fact."
Lol Sherlock does tend to put human matters on the back burner while he's running around solving cases. But in the end, what's the plot climax about? Love! And people. In the end I think he is very deeply in love with his friends, and thats what ultimately draws people to the story.
Also, more words from Moffat... sorry.. but it's relevent!
One other topic of conversation that fans engaged in following the series premiere of Sherlock was the seeming shift to more character-focused stories."It’s interesting, when were we that mystery-driven?" Moffat said when asked if he felt that the series had changed its direction this season. "The only totally mystery-driven story I can think of is "The Blind Banker." I mean, "A Scandal in Belgravia," which is outrageous from that point of view, has a crime story going for about, what, 25 minutes? Then it’s about a boy and a girl missing each other. That’s it for now. Then the plot, more or less, wakens up towards the end. I think we’ve always favored the characters, because that’s the vivid thing in Sherlock Holmes stories. At the beginning of every Sherlock Holmes story, there are two or three pages of just Sherlock Holmes and Dr. Watson having a chat by the fireside. That’s what people fell in love with. So we’ve always favored that. As we keep proclaiming to anyone who’s not completely bored of it by now, it’s not a detective show; it’s a show about a detective. That’s why it’s a hit. That’s why it’s exciting."