The plane: Flight QR921 on a Qatar Airway's Boeing 777.
My seat: 7F, a centre seat in the last row of the Business Class cabins. There are 42 seats in Business class, arranged 2-2-2. They're very roomy, but not as cocoon-like as other planes; there's not a lot of privacy between you and the person next to you, and I did feel a little exposed when sleeping.
The seats have massage settings, and lots of storage nooks for magazines, shoes, toiletries and all the other debris that seems to build up when flying long-haul.
Flight time: This is the leg known as the longest flight in the world; we were in the air for 16 hours and 53 minutes. I was feeling very anxious in the days leading up to the flight, trying to mentally prepare myself to be cooped up and in the air for so long. But it was surprisingly easy, with plenty of time for a decent sleep - obviously being in Business helped, a lot.