I have used a variety of DE blades and get a good shave with all of them. There have been discussions about which blade is the sharpest, but why not use the sharpest blade?

a) aren't ALL DE blades extremely sharp?
b) Since the purpose is to cut as cleanly as possible, why not use the sharpest blade?
c) Aren't any mishaps, e.g., nicks, the result of either technique or uneven surface?
d) Is there really a blade that will cut a whisker but won't cut skin???

To me, the shave is more dependent on the razor used and the technique than on blade sharpness.