When we bought our French bolt-hole the plan was that it would be let as a holiday rental so we went for bog standard crockery on the basis that anything broken could easily be replaced by a visit to our nearest supermarket. We bought six of everything - tea plates, dinner plates, soup bowls, cereal bowls, cups, saucers and mugs - even though the house only sleeps four. We even bought a few spares which we hid away in the loft. As it happens, only one of the cereal bowls has been broken - and, of course, the pattern is no longer sold. I say "pattern" but the crockery is actually plain. Or nearly plain. Three of each item are yellow with a green rim, while the other three of each item are green with a yellow rim - all coordinated with the yellow and green kitchen!
Now, you may well think I'm a bit odd when I confess that I prefer to use a green cup or mug rather than a yellow one. I'm sure the tea or coffee taste no different; and the coffee looks no different as I drink mine without milk. (is it non-PC to say i drink my coffee black?) But the yellow crocks cast a strange light on tea. So I stick to the green.
At home, I have no favourite cup - but I do have a favourite mug. The colour is just right for both tea and coffee and - most importantly - the handle is the right shape and size to be comfortable.
If all this seems a bit too much like navel gazing for your taste, I should tell you that it was only yesterday my attention was drawn to a survey which shows that 65% of we Brits have a favourite mug or cup. I did say that this is a new survey, but I'm blowed if I can find anything about it. All I can come up with is this report from 2009.