Overnight layover, with an early morning flight.

If it takes me more than an hour by public transport to reach downtown I'd rather stay there than avoid going into the city and back. Food wise, fast food or convenience store options nearby. Not that fussy if I'm only going to be there for less than 8-12 hours. I always have snacks and granola bars to tide me over if I'm still hungry after a meal before eating at the lounge/ airport cafes the next day.