It all depends on the night before and the day ahead for me… busy night=coffee/tea, hangover= a boozy breakfast is called for to ease the pain… light night= juices, as than we can afford the extra sugar intake!
Tea (English Breakfast obviously) or orange juice (with pulp)…
…. Unless it’s a Wetherspoons (or airport) breakfast - in which case a pint (preferably Shipyard.