On the 77W, those exit row seats (22AB and 22JK) seem to be in high demand. No window, and it can be cold by the door (which has been mentioned to me by more than one crew member - so it must be a well-known thing). I found that the window seat can seem a little claustrophobic if there's someone in the aisle seat, but this is actually all psychological because of the shape of the cabin sidewall and the door.