1. India was one of the greatest cultural and intellectual centers of the world before interference from foreign western nations. I don't remember who it was -- it might've been Robert Cowley? -- but one of the historians I read recently made the point that if a culture develops a certain level of sophistication, it will tend to try to return to at least that level again in the future. That is, civilizations have a "cultural memory", and India in particular would have strongly benefited from this effect.
2. Post-colonial Indian government is modeled in significant portions on parliamentary structures, especially British ones. I think it's a bit disingenuous to dismiss the influence of British government in India.
3. Mahatma Gandhi. India was fortunate to have a cultural leader of his magnitude; he was an amazing individual, and I don't think it's hard to imagine a very different modern India without him.
4. You might want to edit some portions of the Wikipedia article on India; it tries to give the impression that there has been more violence and trouble since the end of colonial rule. I don't know enough Indian history to cite it one way or the other, but if you think the opposite is the case -- and you can support it -- then it would be nice for WP to get updated.