I used to cycle through Amex Gold Ap card and CIBC Aerogold.
Now, I am less sure about accumulating even more miles to AP. Between Mrs GG and I we have close to 1 Million AP miles with approx. 300k to expire next year.
As was said the cost of burning those miles on free travel has at least doubled which makes the whole thing a far less attractive proposition.

I'm not keeping score but from your comments it would seem like a majority like SPG Amex and Capital One Aspire.

Interesting....