The Camino Primitivo is the most challenging of all the ways to Santiago de Compostela but also the most rewarding ones as you will pass through the untouched nature of Asturias.
There are less people on the Primitivo than on the Frances or the Portugues and you can enjoy the scenery all for yourself at some times.
However, I seem to be spoiled as one my followers, Sindre Sandvik is currently walking the Camino Primitivo and uploading videos on a daily basis. He has formed a great Camino family and you can really feel that a bond has been formed. Check out his blog Sindrealmost.com.