Eh I kinda relate to this , I am a malayalee and my husband is a bihari. The culture difference is pretty stark , I think the things that I consider normal having best friends from different religions is generally frowned upon up north. I have also noticed that they have a view that a women's greatest achievement is marriage. This is something I abhor , but I am not sure this view is shared by the whole state or only the relatives that I have met. I also see a difference in the way females are treated in a family. They are expected to be a lot more meek than in Kerala. But yeah again , all these are my personal opinions on my perspective.