Biz & Family
I travel for two reasons: business and family.
I run a technology & content startup, so I fly YVR-JFK, YVR-YYZ-BOS, and YVR-YYZ a fair amount. Occasionally I do a flurry of YVR-SFO runs.
My wife's family is located on Eastern Seaboard of the U.S., and in the Caribbean, so we go there once a year. My family is in Australia and China, so we visit those locations once every few years.
I use AC for most of the flights, although I prefer CX for YVR-HKG and QF for YVR-SYD.
Oops! I forgot to add biz travel frequency. I used to fly back and forth YVR-YYC three times a week, catching the early morning commuter and returning in the late afternoon for a contract I had with a Large Corporation there. I'm glad I don't do that anymore.