Tea is my favourite drink! If I had to only have one drink for evermore then it would be tea. I’m drinking my first mug of the day as I type.
On BA I will drink tea but on other airlines it’s always coffee as they, like most foreigners, don’t grasp the concept and serve it in unusual ways*. Tea bag in frothed milk comes to mind on a QR flight.
However, other than a nice mug to sober up at breakfast time on a long haul flight I generally stick to wines.
* Russia and most of the former Soviet countries do understand tea. So too do AI; I remember getting a nice cuppa as we landed at JFK in a pretty china cup.