What's my cat/kitten??

Hey,
this is my cat, he is a 10 month old, he is nosey, loves climbing, chewing demanding food, but he has a strange coat, it's long in parts and short in others, he has curly whiskers at the ends.
he has baffled the vet as when he was a kitten they thought him an oriental mix, he is no longer remotely looking oriental

Aw thanks for replying, he seems to have traits of main coon and possibly norwegian forest, as he has the fluff in his paws and the main going on, but no way to tell. He was a rescue so he is a mystery.