I just want to make a comment. I notice that most ppl feel bad that only certain anguages are chosen. While this is true, myself being a tamilian, it is also important to note that it is a personal choice. One cannot ask the person why he chose to neglect other languages. It is probably coz he/she was not exposed to it/ or doesn not understand them in the cultural sense.
Choosing Top 10 Indian movies is an excercise in futility as there are way too many languages and way too many movies to choose from.
But hey, it does make for some timepass reading :)
Your list is really commendable.But the real problem is most of these films were not watched by the real audience.So it is impossible to comment on your list.But still you missed a lot of important film makers like Jabbar Patel,Raj Kapoor, Janhu Barua,Sanjay leela Bhansali to name a few.