I probably have more folders with S30V than anything, but thats not my favorite. I really enjoy touching up my blades. Probably more often than needed. That being said, AUS-8, 420HC, BG-42 are my favorites for the simple reason, I can make the knives I have in those steels pretty sharp. S30V is a great steel and I do alright getting an edge, but the others I mentioned have always been my favs!