My favorite train station is Rani Kamlapati Station in Bhopal. I have not explored many airports, so I do not have a named airport favorite.
I haven't explored much of Airport.
My most favourite train station is Rani Kamlapati Station at Bhopal.
I describe Rani Kamlapati Station as India's first private railway station.
I find Rani Kamlapati Station very clean and systematic unlike other Indian railway stations.