Any advice would be a great help. In addition to tho info below, I am trying to schedule a flight in J BKK-PDX-BKK in January. I am basically starting over with FF programs, so any advice on which airline/program before I make reservations would be greatly appreciated.

(1) What is your home airport? LGW
(2) What types of fares do you usually buy ? Y
(3) How many miles do you usually fly each year? >50k
(4) Do you have any kind of status at present? What is it? UA Premier, TG Silver
(5) What is most important to you in a FFP? Frequent upgrades on travel, good award redemption rates
(6) Which routes do you fly most often? TransAtlantic
(7) Preferred Airlines - none
(8) Do you travel for work or pleasure? work--discounted Y fares