(1) What is your home airport?
BRU
(2) How many miles do you usually fly each year & in what class?
Last year, I've earned 10k in M&M
(3) What types of fares do you usually buy ?
Economy
(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?
I travel for pleasure for holiday so the price is the most important factor.
(5) Which routes do you fly most often?
Around Europe, Europe-Asia, Europe - South America
(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?
I don't have any FFP status. However, I have around 25k miles in M&M.
(7) What is most important to you in a FFP?
Upgrate for travel and good awards ticket
(8) Preferred Airlines
LOT, Lufthansa, TAM, ETIHAD, British Airways

The most important for me is to have a possibility to gather miles without affraid of losing them if I am not travel using airline of one aliance for the long time. For example, I had around 8k miles in Flying Blue gathered during my trip to Japan but they all gone because I haven't flown using SkyTeam for a long time.
In addition, I fly rom time to time with One World. I've allready booked 4 ticket for Iberia. During las two months, I flew couple of times With Air Berlin or Malaysia Airlines.