Is Brittany worth a road trip?
Brittany is worth it if coast, stone towns, seafood and slower driving are the point. It is less convincing when squeezed between Paris, Normandy and Loire just because western France looks close.
Answer
Brittany is not the France of lavender fields or Riviera glamour. It is more Atlantic: weathered stone, tides, seafood, harbour towns, coast walks and a mood that improves when you stop rushing east-west across the map. The region can pair with Normandy, but only when the route has enough days to avoid turning both into a blur. A car helps with the better coastal corners. Add Brittany because you want that saltier, slower west, not because the map has an empty edge.