(1) What is your home airport?

SIN

(2) How many miles do you usually fly each year & in what class?

>50k, economy, business, rarely first

(3) What types of fares do you usually buy ?

Economy if I pay, economy or business if someone else pays. Probably > half economy.

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

Can usually choose airlines, and can often choose the class of service, but there is normally a fixed budget, so choosing business burns through it much much faster. Travel for work and pleasure.

(5) Which routes do you fly most often

SIN to Asia (e.g., China), less often to Europe, still less often to US. Would like to eliminate US entirely, but can't.

(6) Do you have FFP status of any kind in OW or other airline at present? What is it? Do you have any miles banked in a FFP?

Both AA and BA, very low miles and no status. Million-miler and current 1K member on United, but I avoid UA whenever possible. However, remaining star alliance, and flying on partners, might be a viable option.

(7) What is most important to you in a FFP?

Upgrades, free baggage (but usually get that ex-Asia anyway), lounge access.

(8) Preferred Airlines

Haven't been flying OW much, so little experience to base this one. I am thinking about joining the plans of Cathay, Malaysia, or Qatar, but would consider others (or remaining in AA or BA).

My inclination is to join Cathay, but that is a rather uninformed opinion at this point.