What is the most comfort temperature for tea?
Tea temperature and brewing time is purely personal preference, as is tea condiments (milk, sugar, honey, lemon etc.)

The only real factor is maximum brewing heat, some teas taste very bad if brewed too hot. Most teas should be brewed at 95°C or less, which luckily is more or less what happens if you aren't too fast with pouring out the kettle. AFAIK heating tea above 95°C or boiling tea brings out a very bitter tannin that most people do not like to drink

Interestingly most tea brewing charts with any science behind them are from Asian medical studies on tea health properties, and reflect the best way to brew tea to get the claimed good bits out (antioxidants, flavonoids etc.). These brewing time and temperatures charts don't necessarily reflect on the method to get the best taste, and certainly this is anecdotal to my own experiences with tea