I've used and sharpened:
3V
1095
O1
Blue #2
cpm154
M4
CTS XHP
5160
10V
All of them have their unique characteristics.
I do like these steels for these reasons:
- Out of that list, 10V has by far the best wear resistance. Great cutting/slicing steel. It can take acute geometries. Sharpening it takes time though. It takes an OK edge. It's not stainless, but it is easy to maintain.
- M4 and Blue #2 both take the finest edges I've witnessed. Personally, I can get both of these steels screaming sharp. Blue #2 is EASY to sharpen too, M4 not so much. M4 can take acute geometries.
-cpm154 is the lowest maintenance steel I've used. Simply easy. Easy to sharpen and takes a decent edge. Only OK edge holding. It can take acute geometries.
My favorite?
3V wins. It simply has the best overall mix of characteristics of any steel I've used. This steel is nearly fool proof. Drop it on a rock in the field? It will probably still be usable, and as soon as you get home it can be fixed. It CAN split hardwoods without deforming. It takes a nice edge, but not the best. Not stainless, but really close. It can take acute geometries. Decent wear resistance, but not the best. This steel has become so popular lots of makers know how to make knives out of it. Some of them really know how to make bad a$$ knives out of it. IE, there is a lot of knowledge surrounding this steel at this point in time. Bottom line, from a users perspective... It just works and it's easy to take care of.