For me this is a homecoming of sorts. I left India with my family when I was a child. That last time I visited was almost 15 years ago. But,that was to a different part of the country. So while much is familiar to me, its all first impressions.
That being said. People tend to remember smells more vividly than things they see. And for me I could tell I was in India when I came out of the plane at the Delhi airport.