(1) What is your home airport?
Reply: TXL from Jan (or BER then)
(2) How many miles do you usually fly each year & in what class?
Reply: 50k-100k, Eco
(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?
Reply: Travelling for business I can choose the airline
(5) Which routes do you fly most often
Reply: BER-LHR every second week, BER-EWR every quarter, BER-FRA frequently
(6) Do you have FFP status of any kind of OW or other airline at present? What is it?
Reply: Still Gold at LH; Silver at AB; Platinum at AF
(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 and prio services
(8) Preferred Airlines
Reply: Not Air France!

Note: The obvious choice so far has been AB, but with the recent Etihad and AirFrance move I am starting to consider this. I could imagine it would be better to use AB as carrier, but with a BA FF card.