With Delta now offering pre-selection of meals on all inbound and outbound flights in Delta One business-class the seat location doesn't matter as much anymore. I used to go for a seat on the port or A side of the aircraft because the purser typically worked front-to-back on the 767s starting with this aisle. 1A is great for a daytime flight, but the lights and noise from the lavatory and galley is too much for an overnight flight.