Yesss best question. In fact, I have several. I’m going to start this off, though, for those that are like ‘wtf, Mystrade? What is this crack?’ I’m going to send you to here and here, because they’re concise arguements for Mystrade that are far more eloquent than I could ever hope to be. For the fics where there are naughty bits, I’ll put an (M) next to it. Also let me know if I messed up the links in any, and I’ll redo them.
I’m going to start this off with just a general blanket statement: Besides all of the fics listed below, anything and everything by Macpye, Evawrites and Marmosette is excellent.
Starting with the classic: At Least There’s the Football (M). This one was written after the first season so it obviously diverges from second season canon, and it’s not complete yet but it’s seriously long and so. freaking. good. It is the gateway into Mystrade.
Mate (M) is a Vampire!AU with Mycroft and Sherlock as vampires. It’s a fic with a dark tint to it, so be warned of that. The excellent Johnlock sequel is called Thrall (M).
Parenthetically (M) quick and dirty (in certain places,) with an ending that makes me grin every time.
You Bring the Rain (M) short and sweet and porny with a nice fluffy ending.
I Know the Steps but I Don’t Know the Dance (M) I really really like this one. Another how-Mycroft-and-Lestrade-get-into-a-relationship fic.Very well-written and entertaining.
Of Shoes and Ships and Stolen Mobile Phones (M) Sherlock pickpockets Lestrade and swipes his phone.
Bulletproof (M) Lestrade is bulletproof.
The Waiting Game (M) in which Lestrade and Mycroft have relationship difficulties.
A World More Full of Weeping (M) a very interesting AU that uses the Fae mythology.
Something Wicked (M) I honestly had to read this one through a couple times to get everything, but it’s a delightfully dark AU where Lestrade has the ability to see the supernatural.
Find Your Footing yet unfinished but off to an excellent start. Lestrade and Mycroft post-Reichenbach.
A Year of Mystrade Texts I know that Sherlock says Mycroft would rather call than text, but this is so adorable that I don’t care. Fuck the police. ….er.
Debriefing first-time snogging after Hounds.
In The Aftermath short post-Reichenbach fic.
Club Commiseration in which Sherlock and Mycroft completely fail at wooing John and Lestrade and bitch about it to each other. Totally adorable.
Mystrade Advent Calendar aka 24 snippets of adorable Mystrade.
Kissing Booth The Yard has a kissing booth for a fundraiser. You can see where this is going.
Five Disaster Dates And One That Went Like A Dream adorable and hilarious, with Mummy!Holmes and Sherlock popping in to have a word or two also.
Learn to Wear Each Other Well is an excellent story of Mycroft and Lestrade and how they got into a relationship in the first place.
Drunkdailing is what it says on the tin. Mycroft drunk-dails Lestrade and it is adorably hysterical.
How Sherlock Finds Out in which Sherlock Holmes deduces that Lestrade is sleeping with his brother. Short and entertaining. Poor Lestrade.
"Fillish" An amusing fic from the kink where Mycroft and Lestrade accidentally get married in Las Vegas. I don’t know, but it works, and the ending is cute.
Please Confirm You Are a Human Below is adorable and amusing in its inventiveness. Mycroft and Lestrade meet through CAPTCHA. Yeah, you heard me.
CAPTCHA over is a minifill on the kink meme that starts out cracky but then gets serious and a little D8 at the end. I love it, though.
ASIDE FROM FICS there are some pretty damn good videos on youtube. So browse through those. But especially watch Bad Things, which is brilliantly timed and oh man one of my favorite songs that has now become a Mystrade song. Also Just Haven’t Met You Yet. Gosh I wish this one was longer than 48 seconds. But it’s adorable so…there you go. AAAAnd then there’s It Is What It Is which is really sad and depressing and makes me go read fluffy fic because ouch right in the feelings.