I'm French, Spanish, Mexican and American, what should i be consider?

Hi,

I have French, Spanish, Mexican heritage and I was born in the US.

I love all this countries but shoule I be considered? American? Spanish? French? Mexican? Spanrenchmexiamerican??

It is pretty weird because as soon as I say that I have Mexican heritage, people automatically catalog me as Mexican, even if I tell them about my European heritage.

Any comments?

Thanks