I'm still making my way through all the Cabin Pressure fic fandom sees fit to make available. Here are a few of the ones that worked best for me.
Home Is Where the Horizon Is by Anonymous: "He could feel his face turning red, the tips of his ears burning brightly. He felt suddenly light-headed and nauseous. It was a familiar feeling, since he started school and the bullies had given him his first taste of mortification. He had forgotten how it tasted metallic and sour. He mumbled, 'I don’t have the money.'" When Martin's van work dries up, he's kicked out of his apartment and forced to rough it on Gerti. Of course, he can't keep it from his co-workers for long. Classic h/c plot, perfectly executed.
Boggle by Firelight by Anonymous: MJN gathers to celebrate Arthur's 30th birthday, and get snowed in together. Sweet and adorable.
If Wishes Were Horses by Errentcomment: Just after the events of 'St. Petersburg', Martin is having difficulty dealing with the degree of danger they faced during the bird strike. Sweet, thoughtful Martin/Douglas friendship story.
All in All by Anonymous: In a world where everyone has wings, Martin's don't work. Premise should be cracky, but the story is quite serious and moving.
Given More for Less by LadyT220: After his van breaks down, Martin is desperate to find the money to repair it without quitting MJN, and forces himself to try prostitution. Douglas ends the career of the world's least likely rent boy and discovers its possible for him to act without ulterior motives. Warning for descriptions of prostitution and violence, of course.
And a Good Day Was Had By... Martin by Cleo_2010: Martin has one good day. Wonderfully sweet!
A Captain's Worth by thricetroubles: One joke too many, and Martin's had enough--he's quitting MJN. A bit overwrought in places and folds up a bit too fast but if, like me, you have a need for fic where Everyone Is Nice To Martin, this will satisfy.