Perhaps selfish, but i refuse to have one.
We all (in my household) like baths, personally i hate showers. I do have a lifelong bad back so a hot soak at the end of the day does me wonders.
Having had kids and now having grandkids, i like to have a small paddlling pool when the weathers hot.
My in laws have a meter and although he (the FIL) may be a bit OTT, ive seen what it does to some people, he's become obsessed with water useage. I dont want to turn into my FIL, worry about having 3 baths a day run in our house, worry about how much water is going into the paddling pool etc etc etc.
And to save what ? maybe £1 a week according to some peoples bills above, with a meter.
BTW, you perhaps already have a meter installed Ian, i have, they did everyones in the area some time ago, you just have to elect to go on the system.