Like many here I have about two dozen, but I try to use them all at least once every 6 months or so. Mine are all vintage and I group them into 5/8, 6/8 and "old" - meaning wedges and other old blades by Barlow, Rodgers, Heiffor etc. To choose a razor for shaving I first decide on size and then on maker. Factors such as sharpness and smoothness also play a role - they're all sharp but some aren't so smooth