The T1 Domestic Lounge is sort of a home from home for me. As of yesterday evening it was still looking good, with no less than three very friendly 'dragons' manning the door.
My favourite spot is up the escalator, all the way to the back on the right, it is round the corner from the rest of the lounge and has quite a private feeling I think. It also has rather comfy seats with footstools which are good for a snooze, or you can just watch the planes go by.
PS don't bother with the bagel sandwiches if they are on offer, they are rather like glue in the stomach..