Let me start off by saying that I'm a native speaker, and that many native speakers disregard several basic grammar rules. In time, I fixed most of the flaws that I found in my grammar, but there's always one poking at my mind. This time, I'm questioning the state of being in collective nouns. Here is an example of what I stated above:

His family is/are Asian.

Now, I know the basic rules for collective nouns, but ever since I moved into a foreign country, I began to question my basic english, as stated above. I'm extremely used to saying "is" in cases like this, but today my English teacher stated that the correct answer would be "are". I don't want generic answers like: "You use the plural form when it is a group of individuals acting separately, and the singular form when they do something as a unit." If you're going to answer in that fashion, please don't, as I am asking for the answer in a state of being, not a state of action.

If it helps, I think I may have found a rule here, and that rule is to change the collective noun in to the proper pronoun to make it easier to see which one would be correct, but I'm not sure if this is a rule. If you have an answer, I'd be very happy if you could leave it as a response.
His family is/are Asian.

It depends completely on the speaker's mindset. BrE tends to use the singular; AmE tends toward the plural. What pronoun did you see as representing 'family'? They? It? Pronoun choice is an unrelated problem, and you cannot use both the noun and the pronoun in this sentence; you would have to create a different sentence: 'They are (of course!) Asian.'
I agree with Mister MC.

I'm an Asian but not a traditional one. (However, still traditional enough to consider "my" family a single unit)

Many traditional Asians place family above the individual.

With many newer generations living lives away from their families and not getting married, I can see many count family as a group of individuals linked by blood.

Depending on how a speaker value or define what a family is, one can use single or plural.

P.S. If you don't want to get on your teacher's bad side, just do what your teacher tells you to do unless its wrong. (in this case, its not wrong!)