I would echo pretty much everything RT Lover has said.
I'm based near Angouleme Charente 16
I'm not keen on Northern France either, unless it's the Eastern side where you can pick up the Alps
I would defo take in the Massif Central, superb roads and scenery.
The Gorge & Pont d'ardèche are well worth a visit.
The Pyreenes ya cant go far wrong no mater where you go.
Always good roads, and not over populated (providing you avoid August that is)