Usually Premium ecconomy with Virgin when flying transatlatic, which is a kinda combo.
Last year I actually
downgraded myself to ecconomy which was practically empty. 4 ecconomy seats = 1 bed
I got upgraded to their "Upper Class" in January which was nice, but in my view not work the $10k pricetag.
Best bit was being able to have a power shower upon return to LHR
Always ecconomy to home in Tenerife, no such thing as first class here:D