(1) What is your home airport? (Melbourne, Australia)
(2) What types of fares do you usually buy ? (discounted economy)
(3) How many miles do you usually fly each year? (>50k)
(4) Do you have any kind of status at present? What is it? (Delta Diamond)
(5) What is most important to you in a FFP? (upgrades on travel, priority services when flying the airline)
(6) Which routes do you fly most often (Transpacific)
(7) Preferred Airlines (previously Delta, but now will be Singapore and Air Canada)
(8) Do you travel for work or pleasure? (Work. Have some choice of airlines, no choice in class of service.)

I have recently relocated from Montreal, Canada to Melbourne, Australia for work and am about to book my first trip for work and need to have this decided before I do. Unfortunately, loyalty to delta/skyteam does not seem to be a viable option from Melbourne and will likely start using Singapore for my business travel.

Question is, do I join Krisflyer or dust off my old Aeroplan card and work towards elite on that? Which one offers better benefits?

Also, I know Krisflyer does not take challenges, but would aeroplan take a challenge based on my Delta record and offer me status for a year in exchange for my potential business?

Any help or suggestions would be great...

Thanks!