Neelakantan has some tips for new-comers (the corporate/semi-tourist variety) to India. I can relate to this because I’ve doled it out to some at times.

Expect your conversation to be around, “Is this your first visit to India.” If it is, great, atleast for those who are entertaining you. If not, expect some level of disappointment among your hosts, but fear not. They will find some thing about your visit that makes it a first - like a first visit in winter or the first visit when it rains and take it forward from there. The conversation will then range from multiple levels of education on what India really is and is not and that is shaped as much by opinion as by circumstance.