I have been underwhelmed with F the last few times. I dislike empower and had several flights where they only carried one or even no adapter and I missed out. Food on an airplane is always bad (altitude stuff aso) and I don't drink on board. I find 62A/K or 64K more private than F and I can sleep anywhere as long as it is flat.
What possible reason could I have to fly F?
Edit to add that I agree with the poster before me. On a 777 I would prefer F.