Its been many years since visiting Mumbai. So long ago that it was generally known as Bombay. It was a vibrant city even back then and my visit was very enjoyable. Like you, the more rural areas of the country attracted me. Perhaps even more so than you, staying mostly in Goa to the south.
Mumbai is a vibrant place, anyone who visits this place loves it.
India is a diverse land, you find all types of landscapes here. The rural area of India is indeed very beautiful