To add a slight nuance, in First, it depands whether I'm flying alone or with Mrs PJH981:

F (Alone) 747 >>> 777
F (Accompanied) 777 >>> 747

I find the E/F seats in the 747 just too cramped and exposed

Club: 747UD >>>>>>>> 380 >>> 747 LD >>>. 777 >>> 321 >>> 767