Hehe,yeah, why not.... Will you trust me ??
Taj Mahal is the most beautiful thing in India....rest, there are many things like, desert, hill stations,water falls, sea beaches, delicious foods etc :p
It depends on you that what you would like to see more. Its difficult to travel to whole country as India is very large (world's 7th largest country), it will take much time to do so ... :)