There are so many regions for growing wine in France. Depending on the type of grape you grow. There are some grapes that grow better in mild weather, some in warmer regions, and others in cool. The soil is different in every region as well. Hillside to flat depends as well. And that goes for Champagne too. Here in the US, we can't call what we make Champagne, it's sparking wine. France is the country it originated from so they have the rights to the name based on the region Champagne.
There are so many family owned winery's and they have been passed from generation to generation.
If your a wine lover, you should go for wines of France.