Back when AirMiles first announced the plan to have miles expire.  I promptly switched future points to be cash rewards.
At the time Air Miles had a great dream reward of being able to purchase a BMO investment certificate.  950 miles for $100 certificate.  It was hard to find and I had stumbled upon it a few years earlier.
Shortly after this announcement they removed this reward.
Air Miles is now at the bottom of my list for points / rewards that are out there.  
My #1 is PC Plus points