Similar to sequels, remake of old Bollywood classics is also a trendsetter. Such experiments have been done in the 1950s too (I would like to avoid mythological/historical films/drama which have been repeatedly made in Bollywood). Don, Chashme Badhoor, Seeta Aur Geeta, Zanjeer, Agneepath, Devdas, Himmatwala, Umrao Jaan, Khubsoorat (an inspirational plot only), Golmaal, Sholay , Karz, Saheb Biwi Aur Ghulam.... list is very large.
My personal choice is Mother India. Quite surprising, it's original 'Aurat' too was directed by Mehmood Khan. Definitely remake is better than original. Can you find a few more such remakes, which exceeded in quality than its original. Chaalbaaz (remake of Seeta Aur Geeta) and Don are a few more which kept the standard of originals. I would like to mention Dev D - a modern take on Devdas, and the movie is quite outstanding.
Khiladi - the first one of the installment was heavily borrowed from Khel Khel Mein, and I should say both the movies are good.
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