Well, I'm going to request some thoughts and ideas from you guys. Basically, I'm writing a story that's a modern adaptation of Sherlock Holmes, but it's not based off the characters from BBC Sherlock and I don't want it to be like a Sherlock fan fic, I want it to be individual and sellable!

The only problem is, whenever I sit down to try and write it, I can't get Benedict and Martin out of my head, and I just hear them speaking the dialogue and doing the actions. How can I build up the characters so that they're sufficiently different, bearing in mind that they're basically always going to be the same characters anyway because they're still Sherlock and John or Holmes and Watson? There's only SO many differences they can actually have...