It is twice the size of the UK and has the same population. The further south, the warmer the climate. I can't put my finger on it but as you pass the middle of the country, ie, Limoges, the air changes - warmer, stiller, better scented.
It is a socialist country and much of the infrastructure is state controlled but to a higher standard than the old nationalised version of the UK. Paradoxically, its healthcare system, which is far higher calibre than the NHS is a social insurance system. Services throughout, however, are very bureaucratic, especially around property.
Food is viewed differently and revered more and quality is generally better but don't believe the supermarkets are bereft of UPFs. They are not and there are pockets of deprivation that mirror those here.
The pace is a little slower, and midday/lunchtime is ringfenced and treasured. Shops shut and it isn't always to the liking of Brits.
Touristy areas and holiday camps abound but on the whole are not infused with what I'd describe as Kiss me Quick mentality. It is a very verdant country even in the South.
As mentioned by a pp the French Pyrenees/Cotes Vermielle is a spectacular area, far more understated than Biarritz or Nice/Cannes which have a different, chicer but louder charm. I am, of course, biased.