(1) What is your home airport? (SFO, SCL, London LHR, HKG, Singapore SIN etc.)
Reply: DEL

(2) How many miles do you usually fly each year & in what class? (<25K, 25k-50k, >50k)
Reply: >50k

(3) What types of fares do you usually buy ? ( First, Business, Economy etc.)
Reply: Economy most times, Business occasionally.

(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?
Reply: I can choose airline and class or service. Travel for both work/pleasure.

(5) Which routes do you fly most often (US Domestic, Transpacific, Kangaroo, in Asia etc)
Reply: 2 return trips from DEL - ORD in a year and some travel to Europe/Asia.

(6) Do you have FFP status of any kind of OW or other airline at present? What is it? (AA Executive Platinum, QF Gold, UA 1K, LAN Comodoro, etc)
Reply: Delta Silver Medallion, Kingfisher Gold, British Airways Blue. These are all mine. My wife has Bronze on BA which will soon be Silver.

(7) What is most important to you in a FFP? (upgrades on travel, priority services when flying the airline, extra baggage allowance, good award redemption rates, better award access, free - discounted lounge access, etc.)
Reply: Upgrades on travel is most important.

(8) Preferred Airlines
Reply: KLM/BA to USA and no specific ones in Asia

We are mostly looking for getting upgrades through miles and hence what would be the best program that allows us to do that?