I always talk "Beauty lies in Beholders Eyes". India is big country, at least 4 race - Aryan, Mongol, Dravidian And Mixed. You can also talked of Arab. India has 21 official language. It is difficult question. I also do not want to offend anyone with my reply, and I like and love most of these Cuisine, I will reply want I enjoy eating and making. I am expert chef, apart from managing money for others.
South India - this is all about health cautious people. I like Idli most. ( Idli).
Hyderabad - Biryani - this is best choice.
Kerala - Mutton Chukka
Maharashtra - Zunaka Bhaakar
Delhi - Chhole Bhature
Punjab - Sarso Da Sag Makki Da Roti
Rajasthan - Dal Bati Churma
Bengal - Rasogolla
Gujarat - Baigan ka bhurata bajara ki roti
The list is endless, just more i imagine more I feel eating it.