Excellent writing and characterization. The author also writes for the Harry Potter and Cardcaptor Sakura fandoms but is currently writing for Fullmetal Alchemist. The author also has two or three FMA/HP crossovers. In between fic updates, the author whips out some of the best written one-shots.
The writer has written eight stories for Fullmetal Alchemist: some Warm and Fuzzy , some bitterly sad. ( To this day, February Thirteenth is the only fanfiction I have ever read that has managed to make me cry.) Whatever the case, you know that the characters' relationships are going to be explored beautifully. Heck, if it's a long story there may even be development, a accomplishment that i the holy grail of a media swimming with OOC stories. There is sex, but none of the stories are Lemon Fic; this does give them an "M" rating.
NOTE: For reasons unknown, all of Laetans' FMA stories are gone. Wither the author pulled them down his/herself, or... Which is a pity; this troper enjoyed those stories.
As a general warning, this author writes mostly Roy/Ed, so if you can't stand that kind of stuff you may want to give this one a pass. If you CAN stand it, give it a look. The writing style is wonderful, especially with descriptions. Special mention goes to the author's current project, The Saffron Soul. I could go on for hours about how wonderful this story is, how interesting the plot is, how vivid the pictures it paints are, how each chapter has me on the edge of my seat... it's just awesome. Really.
Warning: Not for the faint of heart. This author writes some of the most heartwrenchingly depressing stuff out there, and most of it is Edx Envy - but realistic. Which mostly ends up just about as badly as you'd expect. Of special note is their pairing-less AU Hero of the People, in which Envy and Wrath are the Elric brothers.
Her Demon Alchemist series (aka the crazy!Ed verse) is already recced below. Other works tend to be more humorous, and even that much Darker and Edgier take on the series is pretty funny. Tends to write post-canon and canon pairings, with one series solely populated by absurd ships (and RoyEd). Themes common to all stories: Roy and his subordinates' ultimate goal is to take over the world; causing explosions is the Elric way; Ed and Winry (whether as a pairing or friends) can communicate through pointed staring, a superpower they abuse to bicker in public.
Synopsis: "Fullmetal, you're the only guy I know who can turn getting married into an international incident." Ed's wedding plans get disrupted when unknown forces attack Central City. Has its own page on this site.
Synopsis: In a world where alchemy exists, but is thought to be a fairytale, the Elric brothers land themselves in an asylum after their abilities are discovered. But this hospital has a darker purpose, and its patients must band together in order to survive.
Synopsis: It all began after Hawkeye got her dog, and spiraled downward from there. A chronicle of the day-to-day chaos of Eastern HQ, and the supplemental rules that grew out of it. Surprisingly, Ed and Alphonse are not the main culprits. Crackfic.
Synopsis: Trapped and lost in this world, Edward Elric is stripped of alchemy; or so he thought. From Crop Circles to the Pyramids of Giza, Ed travels to the ruins of the world for clues to get home. But he isn't alone, and a painful decision has to be made.
Synopsis: Set a few years after the film, based mainly on that and the first anime. A sweeping epic, with drama, action, adventure, angst, humour and romance. Original Characters. M for a small amount of mature content.
Synopsis: This is the first part of a series of fics detailing the events of Ed's Automail surgery, set a few days or two after the life shattering incident. These fics cover everything from the construction of Ed's automail to the rehabilitation process in incredible detail.
Synopsis: While receiving training following a less than stunning evaluation, Edward is sent to follow a lead involving four friends and illegal experiments conducted during the war that could be what he has been looking for.
Synopsis: 'Free Characters of Fullmetal Alchemist,' announced Edward dramatically, 'I have seen the future, and it is bleak.' The Ultimate Horror...a lousy Ending...demands the Ultimate Sacrifice to change it. Crack, Silliness, and much breakage of the Fourth Wall
Synopsis: Everyone's favorite doctor - and why he hates Roy so much. "There was also that time I worked with that bastard, Mustang. He burned the Ishbalans and I did the autopsies." Rated M for violent themes. Spoilers for Ch. 62. One shot
Synopsis: Crackfic parody. Ed is constantly drunk, and Al is generally depressed. Yet both persevere in their quest to restore their bodies through the legendary Internet, a mythical power said to hold unimaginable forces. However, a hidden, stupid evil awaits...
Synopsis: Spoilers for the first anime series! After the events that ended with Edward in Germany, he travels across Europe to England to try and find a way home. Hohenheim sends one of his research assistants, Ichiro Masuta, who as it turns out is Roy Mustang's counterpart in this world.
Synopsis: "There are lots of things you shouldn't do if you want to survive in Amestris...too bad our favorite characters are going to do it all anyway. The country can use all the chaos it can get! How many headaches can one group of people cause? Let's find out!"
Synopsis: FMA Divergent AU: Upon attempting to resurrect their mother, things went horribly wrong and Alphonse Elric ended up binding his brother Edward's soul to a suit of armor. Their lives have been forever changed since that fateful night.
Tags: Depressingly enough, a deadfic. The few chapters existing are still beautifully written though.
Synopsis: Pride pretends not to remember his past, but he does, and one day after visiting Father he sleeps, dreaming of his creation, and through all the life he'd rather forget, because beneath his arrogant veneer is the deepest loathing for how he used to be.
"Synopsis": Pre-Manga. Ed is removed from his abusive stepfather's care after years of hurt – and placed in the home of his direct superior Roy Mustang. With Al missing and Ed attempting to cope with unbelievable scarring, can Roy hope to be able to help Ed?
Synopsis: After dying in a Concentration camp, Erika figured she'd finally get some peace, right? Wrong. Some guy who calls himself 'God' gave her a mission...That she doesn't remember. Wonderful. Post-CoS, Ed and Al came back to Amestris.
Synopsis: AU. The FMA characters are brought to a room to view FMA Brotherhood. How will they react to seeing their future? Can they change what is to come? Or will they make the same mistakes?
This fanfic should have it's own trope page!
Notes: This is worth a try even if you're majorly opposed to 'fictional characters exposed to their series' like this troper is. The author has constructed several mechanisms to keep suspense up and keep the flow of the story from settling into the tired 'show a scene/characters snark about it' groove. In particular, she makes the characters feel the pain of any injury happening to them onscreen. Also, worth it for complex character interactions in between viewing sessions. And Izumi/General Armstrong bonding.
Synopsis: A Fullmetal Alchemist/M*A*S*H crossover fic. When Mustang's unit is transfered to the 4077th as diplomats, it seems like a good thing. But something darker is going on, and Amestris's problems are about to spill over into Korea. Canon pairings, longer summary inside.
Synopsis: Harry Potter/FMA crossover. One of the few crossovers I've read that actually makes sense rather than being pure crack. It takes place in mangaverse chapter 105/Order of the Phoenix, so here there be spoilers. Ed and Al get pulled through the gate (like all FMA crossovers) and arrive in a strange place that seems to defy every law of nature: Number 12 Grimmauld Place. However, someone (something?) else arrived with them... A great story, though a few chapters are a bit slow because of exposition. No fluff.
Synopsis: Crossover with Harry Potter & HBP. Ed has been put on his stupidest assignment yet: babysitting. Well, that's not what everyone else would call it, but to Edward Elric, it's exactly like babysitting. But there's a lot more to this assignment than what's on file...
Synopsis: Mangaverse crossed with Naruto. Ed ends up in the shinobi countries following the events of the 'Promised Day'. Everything is working out fine for him until he comes across a certain hyperactive blond ninja.
Synopsis: While investigating a bizarre alchemical structure, the Elric brothers get pulled into the Potterverse early on in an AU version of Deathly Hallows. In the interest of finding a way home, Ed lends his talents to the Horcrux hunt while Al finds ways to keep himself busy at Hogwarts. Better than it sounds.
Tags: Seems to be a deadfic but the first half of the story is complete enough to enjoy as a stand-alone fic.
Synopsis: A crossover with The Matrix, in a dream, Edward finds himself in a white void, and within that, the Truth to all that is. Ever since, there has been a splinter in his mind, but that's just the beginning; unbeknownst to him, there is a path he must walk, and a destiny he must face. With the help of the Nebuchadnezzar's crew, all he has to do is free his mind. A mainly Ed X Roy pairing, but that's not all. There are still many doors to open, if of course, their faith will allow it.
Synopsis: Basically, it's the FMA characters in the Firefly universe. All Captain Roy Mustang wants is to do the job so he can get paid and keep flying. But he gets more than he bargained for when he takes on a passenger with two automail limbs and one deadly secret.
Synopsis: In a world where advanced mechanics and firepower rub elbows with high magic and ancient relics, Zolf Kimberly has built the Crimson Flames to be the best mercenary company east of Archadia. Combining infantry with elemental black magic, the Flames are versatile, professional, highly effective, and willing to ground your enemy to dust, for the right price. Fusion with Final Fantasy XII.
Synopsis: After appearing in the headquarters of The Order of The Phoenix, Edward Elric has no idea where he is or how he got there. Mistrust of the people there leads to problems as he tries to find a way home.
Synopsis: An imaginative crossover between Fullmetal Alchemist and Chobits, with a focus on the relationship between Roy and the new persocom that he accidentally bought due to a misunderstanding involving the black market.
Synopsis: The stories in the archive generally take place after Ed and Masuta get back to Amestris and details the evolution of the relationship between Roy, Riza, Ed, Al, and Masuta. This story is a spin-off of The Alter!Series (see entry in general fics above), so I urge you to read that first. There are no really solid, over-arcing plots in the Main Archive, which mostly contains "a day in the life" drabbles (to short stories) about the five and is categorized by subject and not chronology. If a story falls into a certain part of the general timeline, it is noted in the story's lj entry. There is a Plot Archive, where specific story arcs, often following their own canon, are listed.
Tags: M/M pairings, M/F pairings, along with the main OT5 / fivesome / M/M/F/M/M pairing. Stories range from G to NC-17. HAS ELRICEST!
Sypnosis: We have all seen stories of Ed's journey, but let's try a change. What if, ultimately, Trisha Elric never died? Watch as Ed walks a path markedly different from the old, along the way meeting the people who will shape his life. Roy/Ed
Pairing(s): Despite the label Roy/Ed, all that had been seen so far is a very parental relationship between the two, never crossing the line of bromance, Although the author has noted that there will be Roy/Ed romance in the future.
Synopsis: It's an 100 Themes fic, set during the timeskip at the end of the (manga/Brotherhood) series. The chapters go in a chronological order, and some of them tie into others.
Pairing(s): Ed/Winry, although not entirely a shipping fic. It's more like a Slice of Life story with some romance on the side. I was kind of debating whether to put it in this section or the Gen Fic one, but decided to put it here because of the "romance" tag.
Synopsis: "As Roy and Riza work together in East City, sublimating their deeper feelings for a higher good, they must beware of how this sublimation affects others around them." Focused on how Roy and Riza's relationship is not only self-destructive, but how it affects the people they interact with.
Pairing(s): EdxEnvy (male slash alert) for the most part, but since each chapter is separate and not every oneshot is strictly romance, there's also some EdxWinry, and Pride!EdxEnvy
Synopsis: Enemies, nothing more, nothing less, but neither Ed nor Envy are known for being particularly honest with themselves. 100 Themes of Edvy - the author made up 100 themes beforehand for EdxEnvy then proceeded to begin writing oneshots for every single one.