I struggled to meet the required daily amount when I lived in England (and I drank a lot more alcohol). I thought I was alright and didn't need it.
However one of the big differences I've noticed between France and England, is the water consumption. Whenever you go into a restaurant, you get tap water put on the table straight away. My canteen at work has big jugs of water on the table. There are water fountains everywhere. If you're in a bar, you quite often ask for your glass of wine and a glass of tap water.
My skin, my hair, my general wellbeing seems to have improved in the two years since I moved here. I think getting the right amount of water has contributed to that. (and the water tastes lovely here, as I'm in the mountains).
When I'm in the UK I try and make sure I drink a pint of water in the morning before I leave the house.