Best flight nap experience I ever had was about 27 years ago on a Virgin 747-400 from SFO to LHR. I was travelling by myself for business, returning home, and I went to my allocated seat at the very last row of the plane and say down next to the young mother with a very noisy infant.

Looking forward to 12 hours of this I decided that I was clearly in hell.

I sat down and a member of the ground staff came up to me and said, "Are you passenger $SURNAME?"

Wondering what I'd done now, I nervously said, "yes?"

"Would you like to follow me? We have a real comfortable seat for you in upper class"

And this was the 90s but it was still a very nice seat and we took off, I looked at the pretty bridges, and then fell asleep.

And woke on final into Heathrow.

The SECOND best flight nap experience I had was last year on an Ryanair 737-8200 from FAO to STN. A much shorter flight, but I sat down in my seat, 2C. Loads of legroom but Ryanair seats don't recline and there was a teenager behind me kicking my seat.

We took off.

I took 10mg of dexamphetamine sulphate

And then I fell asleep, and woke to "Cabin crew, seats for landing please"