Join Date: Oct 2002
Location: Commuting between AMS, CDG and IAH
Programs: FB LTPE, hhonors diamond, hertz 5*, Thalysthecard Platinium, A-club Silver, IHG Platinum
Posts: 521
9AB have lots and lots of leg room, 10C as well, but is open to the aisle, so somewhat less desirable.
The immovable armrest are indeed an issue if you are of above average waist size.
Any other seat in EC, nothing special; just take your pick based on aisle/window preference.