I have a few knives I use frequently that I don't loan as they are custom made, and very optomized, full hard steels on really thin stock with deep grinds. Everything else though is up for grabs, I usually carry more than one knife and just give them the one that is most suitable. Right now I carry a small Sebenza, Vapor, and Fulcrum. The sebenza gets any cutting, I don't care what, just no prying or batoning through metals/bone; the Vapor gets anything outside of really heavy prying; the Fulcrum can be used for whatever. Even the Vapor and Fulcum have really thin edges as I reground the blades, so they get tore up readily on some utility applications, like a key breaks off a can of corned beef and the Vapor cuts open the can, no more edge on the Vapor.
-Cliff