Please edit wiki to the fact that IST-HKG is now two class B777 without comfort class.

Also, having now flown it both ways in economy I can give some suggestions where to sit.

First we had 40J and 40K.
- There was no window.
- Aisle seats C and H are bit prone to be bumped into while people pass through, so I would take ABJK instead.
- There is protrusion from the slide at door which takes 1/3-1/2 of leg space on A and K. Otherwise there is massive legroom.
- There is galley slightly front of this area in middle. I did not find it bothersome at all.

Took a look at 42 middle rows DEG (bulkhead) and they seemed to have pretty usual legroom for such space, meaning bit of extra. Enough for everyone under 175cm I would say. Longer people cant quite get their feet straight.

Second time we have 23E and 23G
- Toilets are right next to you. There is LOTS of traffic and noise and people try to change side by stepping over your legs which is irritating if you try to rest. They cant do it at row 38 as the seats are at wall. People also seem to gather front of exit seats 24ABCHJK and there is constant light flashes coming from toilet when door is opened.
- Legroom was ok and typical for such bulkhead. People under 175cm should be ok.

Based on this, I would try to take 40 AB JK or 42 DEG
If those are gone, then probably 24 AB JK. I would likely avoid 23 DEG unless you plan to stay awake and just want extra legroom.

I did not check row 11 situation unfortunately.