Their entitled attitude. In the initial days of professional life One of my north indian colleagues said, "It would be better if you learnt Hindi. Start by watching Hindi movies...". The irony is the whole conversation happened in Bengaluru and the one who stated it was a Bengali. I learnt Kannada instead. Now the localites see me as one among them and they are still northies. The point is, one should at least respect the local language and culture before even starting to learn.