Gentlemen,
I prefer the 7/8 and the 8/8 full hollow blades. Mine are all fabulous shavers and well balanced, especially the custom-made blades. My Solingen NOS razors are 6/8 round points and I used them from to time. Anything below 6/8 feels uncomfortable. My sweetest spot razor, however, is the custom-made 8/8 hollow blade.