Not a longstanding fan of ACD but I'm familiar with Sherlock Holmes from many of its incarnations. I love what The Moff and Mark Gatiss have done with this version, including the inspired casting. I can't help but agree with them that though I think Matt Smith makes a great Doctor, he would not have been right for Watson. Most of all, I love what they've done with Lestrade. Not only have they made him competent and believable as a character, they hit the jackpot by getting the lovely – and versatile – Rupert Graves to play him.
Funnily enough, though I loved the first series – and had realised my slash pairing of choice was Watson/Lestrade and not the primary pairing of the show (and my OT3 Holmes/Watson/Lestrade… I always have an OT3) – I didn't really put a toe into the fandom until the broadcast of the second was imminent and started to read around. I've now read almost everything under the Watson/Lestrade tag on AO3, same for my OT3 and am now working on making my way through some of the Holmes/Watson.
I've been in a bit of a fanfic writing slump lately but Sherlock seems to have tempted me back into writing more than a few hundred words at a time; I'm on LJ as aeron_lanart, and AO3 and Dreamwidth as a_lanart if you want to look me up (my av is my default in all those places). There are only 2 Sherlock fics right now, but that may change.