Guys who bought a sample pack of razor blades, what did you learn?

From myself, I started with a pack of Feather and they are definitely not for me - they were very scratchy, felt like a cheese grater. Maybe they are better for someone with tougher skin, my face skin is very thin, sensitive and prone to irritation. Next I tried Voskhod and it was pretty great. I also tried one Sputnik the other day and it was good too. Maybe a little bit duller then Voskhod, but still good enough and with that price I can single use them without a second thought.