I inherited two bone china tea sets, one with a tiered cake stand and one coffee set from my late mother-in-law. Unfortunately they languish in the cupboard most of the time.I love getting the tea service out when we have guests, my o/h is prone to say the cups are way too small, I disagree I think they're perfect, we are not great tea drinkers, but the right receptacle, and they are it, makes the tea taste much better imo.
We have a selection of china mugs some with a William Morris pattern, well his designs get everywhere plus some nice ones from the NT gifted from house guests. Plus a couple of Bart Simpsons, my sons' had from their teen years, not bone china I hasten to add
For our coffee we use white cups and saucers bought for us as a parting gift from our Polish cleaner when we left our old neck of the woods, again they're perfect for our morning coffee, not to big, not too small. I don't really like big cups, I think the flavour of whatever is in them, becomes too diluted. When occasionally I buy a coffee out, it would always be fairly small, such as M&S's Magic Coffee, quality over quantity every time. I certainly don't want mine in a cup the size of a soup mug.