Thank you to all the crews who have looked after me on my many flights either fare paying or ID90s. I hope I made sure you knew I was grateful at the time. Upgrades have happened more often than deserved especially on ID90s where my links are tenuous (and about to be cut) but thanks for this.
A tip to others in my position: Politeness and courtesy are rarely rewarded with anything less than pleasure ... and genoristy.