I used to think it was silly to ask what others would do, but I have a little turn on it. I easily hit the Delta AMEX spending so MQDs not an issue. Because of the Seattle double MQMs deal, I find myself with enough flights for the rest of the year to make platinum, but with very little rollover. Alternatively I can credit my last flight to Alaska Air, and end with 74,000+ miles and rollover 24,000+. Most of my flying is domestic, with one TPAC every 12-18 months, in bought J.
Here is the twist. I am current platinum. If I take platinum for 2015, then for 2016 I will probably qualify only for FO, and since I am a million miler, I get that for free. If I rollover the 24000+ miles, I will be able to be Gold for both 2015 and 2016.
So the question, for you, is two years of gold better or worse than 1 year of platinum and 1 year of silver, and why? I am weighing my reasons, but interested in what others would do. For the economists out there, it is a good exercise in hyperbolic discounting.
I also have TSA Precheck through Nexus, which makes skypriority less important, and who knows, it might disappear for golds soon anyway.
Edited to add: Award tickets are always for my grown kids, and have never had a reason to redeposit an award ticket so far.