I might be able to help on this thread. I am a lowly economy traveler with no status. I fly about 1 or 2 times a year between Austin and Europe. Last year I got within 2000 miles of having status but not quite enough. My company won't pay for business and the people who fly more than me can upgrade using their miles/status but since I fly infrequently I am stuck in economy. I am 6'4" and about 280 pounds. I am pretty solid and can wear clothes from the normal store but I am large from top to bottom. It is just the way I am built. Fortunately my company will reimburse for me to pay for exit row/bulk head seat costs on these flights so I pay the money to get the best seats.

The 787 is BRUTAL. My shoulders overlap into the seat next to me by at least 20% just because of my build. I try to book aisle seats and turn sideways to give room for the person next to me. With that said I have flown in economy on the 787 6 times now. Here is my take on the seats.

My favorite seat in economy is 20F. You have plenty of leg room because of the bulk head but the left armrest can be raised (it doesn't go flush with the seat but I can move it up or down to get it more comfortable). Fortunately the time I had this seat no one was next to me so I could turn into the middle seat. I had the arm rest up about an inch to give my leg some more room but not all the way up because it would bother my shoulder.

My next favorite seat is 30F due to the arm rest being movable as well. There is less leg room than 20F. The problem with middle seats in 30 is people are constantly trying to go back and forth in front of you to get to the other set of restrooms. There are smells and people constantly congregating in front of 30A-C or 30H-K and if a bathroom opens up on the other side people will try to switch over.

I would say all seats in 20 have about the same leg room. 30A-C and 30H-K have the most legroom. I can fully stretch out my legs without touching the bulk head (not possible on 20 or 30D-F). The problem is that extra leg room is used by EVERYONE to wait for the restrooms. You will have someone standing there the entire flight for the most part.

The problem with all seats on the bulk head except for 20 and 30F is the fixed arm rests. I am big and believe me it is impossible to get the remote out. I have to stand up and pull it out before the flight and let it hang. I have to tilt severely into the aisle to get the tray table out.

Thankfully on my next flight in June I am in WT+ in 10J. Then on my return I am in a AA 787 in the Main Cabin Extra. I'll compare the two when I return (I am sure WT+ is immensely better).