What breed is my girl?

This is my cat, Montana. On her vaccination sheet, the vet has recorded that she is a Domestic Medium Haired Cat. But I've always wondered if she's got something else in her. She's the first cat I have ever had. People tell me she's a bit weird, because she's very vocal and loves a belly rub. I find that she trills and squeaks at me a lot. What sort of breed do you think she is? 

Hopefully someone who knows more about identifying cat breeds will come along, but I just wanted to say what a beautiful cat Montana is. I admired her in the Black Cats thread, too - such a pretty girl!   If I were to identify her, I would call her a domestic medium haired black cat, but there are actual black cat breeds and maybe someone can tell you more based on the shape of her head or some other distinguishing feature.  Montana is truly gorgeous, whatever her background.  I love black cats myself and have had four.  

I think the most important had already been said, medium haired domestic, very pretty.   No apparent looke alike to some breed.

I wonder, what is the realy color of her eyes?  On the first photo its a quite intensive green, on the last photo it seems bluish?

Her eyes are a really striking green

Would be interested in the breed too, got a little boy who looks and behaves exactly the same^^

You've got a beautiful little girl there