Hi, as per the opening post, here are my answers to the questions: (thank you in advance for your help!)

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

London LHR

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

>50k
Economy

(3) What types of fares do you usually buy ? ( First, Business, Economy etc.)

Economy

(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?

I can choose airlines and class
Both business and pleasure

(5) Which routes do you fly most often (US Domestic, Transpacific, Kangaroo, in Asia etc)

London to Latin America, e.g. LHR to Peru, Chile, Mexico
Possibly some internal Latin America flights like Lima to Santiago

(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)

BAEC - 15,000 Avios currently
United Mileageplus - some lifetime miles from a long time ago

(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.)

Using my points to get reward flights from London to Latin America, without having to pay huge surcharges still on those reward flights.

Upgrades would be second most important.

(8) Preferred Airlines

Anything except Iberia (my god they are terrible!)