Insta-Rec

Conjugate, one of those Steve/Tony big bangs I was talking about, so, y'know, Steve/Tony, Marvel-verse. Steve, Tony, Peter Parker, Luke Cage, Jessica Drew, and Logan accidentally get their powers swapped and it's awesome, because they totally have to keep superheroing while they're swapped. There's action and humor and angst and love, what else could you ask for? Have some quotes:

"I can't help feeling we should be keeping the Spider-Cap quieter."

"He's enjoying it so much, though. And I bet this guy's face will be a picture. Patriotic death from above!"

and

"I keep telling Steve he doesn't need to know every police officer in the city by name, but he won't listen."

"Aren't there forty thousand of them?"

"Well, he's got a good memory." Tony sighed. "I miss Extremis. I really did know all of them by name. And their birthdays and shoe size, too."

"You do know that's creepy, right?"

"You're part spider, how is that not creepy?"

Oh, Tony

Life would be much easier if other people weren't so inconveniently binary when it came to sex. Change into a different gender and suddenly no one knew what to do with you anymore.
- An Ever-Fixed Mark