These days, most Indians prefer slim women.
At one point, people from China to England considered buxom people to be beautiful.
Even in ancient India, it seems like thinner people were considered more beautiful. If you look at painting or statues of Indian goddesses that are thousands of years old, you will notice that they are all slim.
I personally prefer slimmer(not too slim) people too. I can't stand some of the actresses in Telugu films who try to look "buxom" because they overdo it and end up looking like they are overweight or fat.