A/N Thanks for all of the suggestions! This one was requested by @dragonsis, so I hope that all of you enjoy!
Steve Rogers/Captain America-
You have pyrokinesis, or the ability to control fire. When Steve found out, he was very shocked.
"Hey Capsicle?" You called.
"Yes sweetheart?" Steve replied. You were nervous about a job interview coming up, and needed support. Steve saw this and said "Don't worry. They'll be crazy not to let you get the job."
"It's just that, I'm really nervous." You replied. Then, Steve looked at your hands. Then you realized, when your nervous, your hands catch fire. Steve just looked shocked. (Author: And his face was priceless! Steve: Oh, be quiet.)
Tony Stark/Iron Man-
You have telekinesis, or the ability to read minds. He thought it was really cute when he found out.
"Hey babe. I'm going to the lab to work with Bruce." Tony stated.
"Okay Tony." You replied. But, you wondered what he was thinking, so you read his mind. I love her so much said a voice in your head.
"Love you too, Tony." You said. Tony just looked at you, and blushed. (Author: And it was funny. Tony: Be quiet Cap 2.0)
Bruce Banner/Hulk-
You can calm the Hulk down, no matter what. You may not think that it's a superpower, but the rest of the Avengers would love to be able to do that.
Bucky Barnes/The Winter Soldier-
You have the super serum, so you have the same abilities as Cap.
Every other guy-
You're an animagus. If you don't know what animagi are, you can turn into one animal. For Sirus Black, it's the Grim. For you, it's (Y/F/A). (Your favorite animal)