If you are traveling around in India then you might reach also Punjabi areas and Bengali areas. These are also so big communities that have their own film industry. In that case I would also recommend watching some Punjabi movies and why not also a Bangla movie. Watching different Indian films gives you also feeling of the diversity of the cultures that India represents.
For example Kannada 123 movies differs from Bangla movie by the language, colors, intensity of communication and dresses and even the people look different. As Bengali area is much more north than Karnataka: it can take more than 30 hours by train to reach Bangalore from Kolkata for example.
But for a start try watching Kannada movies online