Pottermore sorted me into Gryffindor, which really surprised me. I thought I would be a Ravenclaw.

I don't see movie!Natasha as that ambitious either, I think they dropped enough hints that her skills were forced on her. I see her as survivalist more than ambitious, but that might be my comics knowledge creeping in. I think I see her more as a Ravenclaw in the movies as well as the comics.

I read one fic where she was a Hufflepuff, which threw me at first but then it made a weird amount of sense. Again this is based on my own interpretation, but I think she's fiercely loyal to Clint, even to a fault. There is some truth in "your world in the balance and you bargain for one man," even though she was putting on an act at the time.