Our top three guesses for your English dialect:

1. US Black Vernacular / Ebonics

2. American (Standard)

3. Canadian
   Our top three guesses for your native (first) language:

4. Dutch

5. Norwegian

6. English

Nope, German is my native language, but it was an interesting quiz, even though I felt it was a bit too long.
My English i also pretty much influenced by all the movies and tv shows I watch and I prefer watching them in English rather than in German.

Our top three guesses for your English dialect:?

1. American (Standard)
2. Canadian
3. US Black Vernacular / Ebonics

Our top three guesses for your native (first) language:?

1. English
2. Norwegian
3. Dutch

German is my native language. The results are very similar to @RaPtUrA :)
Oxford English learned in school, after that I learned in the wild: from books, from movies, from every kind of internet websites/chats.