Do you even need to ask? Why, Detective Conan of course. I remember quite clearly how it happened. I was reading manga as a kid. At my local grocery shop, I was searching for both Dragon Ball and Dino Crisis comics. But they sold out, and sitting there instead was this peculiar manga that caught my eye. After reading the first volume of Detective Conan, I was hooked. Never looked back since and never had regrets.
Over time, due to the influence of the manga (how Shinichi practically worships Holmes), I got interested in Holmes and Doyle myself too. I admit that part of the reason for that was because I wanted to be like Shinichi. lol It was a childish notion, but I'm glad the manga introduced me to Holmes. Such a badass character, a far more formidable detective than that edgy superhero dressed like a bat. If Holmes and Batman went head to head, my money will most certainly be on the OG detective himself.