I realize I may need to change my mileage program and I am looking for some advice. Currently I am UA*S, but with the changes, I don't see much purpose in it. Thank you in advance.

(1) What is your home airport? (SFO, LAX, MCO, etc.)
I fly mostly out of Japan now, but I used to fly in the US a lot, which is why I had UA. Fukuoka airport, Kansai Airport, or NRT are all pretty much the same for me.
(2) What types of fares do you usually buy ? (C, F, Y, etc.)
Not sure what the letters are, but usually I get discount fares.
(3) How many miles do you usually fly each year? (<25K, 25k-50k, >50k)
25-50k
(4) Do you have any kind of status at present? What is it? (UA Premier, M&M Senator etc)
I have UA Silver, but I am annoyed that I cannot get even the smallest benefits in economy plus now. Basically, I get nothing, and I have a very tough time using miles. When I try to upgrade, they are now charging me $600 + 30k miles to upgrade my international flight. What is the point of the miles if I have to pay $600 in addition?

(5) What is most important to you in a FFP? (Frequent upgrades on travel, priority services when flying the airline, good award redemption rates, free lounge access, etc.)
I don't really have a preference. I just want to get some benefit for flying.
edit: When I think about it, I would really like to get to Gold status. I would also like to use miles accrued for travel with my family.
(6) Which routes do you fly most often (US Domestic, Transpacific etc)
Japan to US, Japan to Canada, Japan to other Asian countries (China, RoK, Indonesia, Mongolia). Future trips may include Europe. Sometimes I travel domestic within Japan from FUK to HND/NRT.
(7) Preferred Airlines
ANA
(8) Do you travel for work or pleasure? (Can you chooose your airlines, class of service?)
Work, I can choose my airline, but not class of service. I always fly economy fare.