My Work is taking me to London and Spain more often and I'm thinking of switching to BA any advice is wonderful! Thanks

Questions
For members asking for information, to help people to assist you, can you please provide:
(1) 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
(2) How many miles do you usually fly each year & in what class? How many flights/sectors?
(<25000, 25000-50000, >50000 miles - <25, 25-50, >50 flights?)
Reply: 100,000 Miles Currently Plat Med Delta
(3) What types of fares do you usually buy?
(First, Business, Premium economy, Economy, cheapest)
Reply: Premium Economy
(4) Can you choose your airlines and/or class of service? Do you travel for work and/or pleasure? Choose
Reply:
(5) Which routes and airlines do you fly most often?
(US Domestic, Transpacific, Kangaroo, in Asia etc)
Reply: Domestic though as of recently to London alot
(6) What is your home airport?
(SFO, SCL, London LHR, HKG, Singapore SIN etc.)
Reply: LAX NYC LHR soon
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7) Do you have FFP status of any kind in OW or other airline? What is it? Do you have any miles banked in a FFP?
(AA Executive Platinum, QF Gold, UA 1K, LAN Comodoro, etc)
Reply: Platinum Medallion Delta through 2016
(8) Preferred Airlines? Most common Airlines flown on?
Reply: Delta KLM
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