My wife and I have never been able to travel F on 777. Mere mortals cannot afford that, esp. retired and/or working for a non-profit.
However, I routinely upgrade to J, which is pretty nice for couples anywhere next to each other (esp. compared to Y, although row 31 ain't bad). This year I've got eVIPs for the first time, so J will be all the sweeter!!
Now if one of our corporate sponsors would just spring for a J or D ticket, I could use an eVIP to upgrade to F (my yf says, "dream on Bill!)