Always list for 1st(especially between now and January 3rd). You don’t pay the first class travel pass fee (if you have less than the 20 years or whatever seniority) unless you are awarded a seat in business/first class. If all seats in coach are filled and you only list SA in economy, guess what?: you aren’t eligible for an empty seat in the premium cabin (holidays often produce domestic and international premium seats). I’ve seen SAs left behind with 1st class seats open. Always list for premium cabin. If you get it, enjoy the meal/drink/big seat/no screaming kids etc. Worth the fee. Heck, I purchase 1st class all the time (with our discount) for vacations and even my last month of commuting to the West Coast was all done (both directions) in 1st. Best money I’ve spent on myself in a while.