My most expensive knife is a John Lloyd custom shadow Dogleg Jack with 1950s micarta covers, at around $300. I haven't carried it in about a year (just been EDCing other things), but when I EDCed it regularly I tossed it in my pocket with change and keys and used it for whatever came up -- which, given that I work in an office, is pretty light duty compared to some.
But this comment from Kootaga13 really resonated with me:
Yea, ok, but which one do you give hell? I Don't mean abuse, but I also mean, Don't hold back on.
Right now, I think the only knife I own that I've used that way -- without reservation -- is my bushcraft knife, an Ontario Blackbird SK-5. It's a tank; it's made for that; and at about $100, it's not wildly expensive.
But among my folders, I can't think of any I'd use without reservations. I take care of my stuff, and as much as I try to internalize this fantastic Bob Loveless quote, I often find myself hesitating to really beat on my knives:
"
A knife is a tool, and if we don't treat our tools with a certain familiar contempt, we lose perspective."
I love that quote! And it's definitely a mental thing: my current EDC knife, a Para Military 2, is a tool -- and a tough one, at that. But I don't use it like I'd use the hammer in my toolbox, even though that's also a tough tool designed to perform its intended tasks well. I don't use my PM2 without reservation.
Funnily enough, I've got a Cold Steel American Lawman in the mail right now, and I'm hoping that it's a knife I will hold and think -- like I did with the Blackbird -- "
I can do whatever the hell I want with this, because it can take it." I want to make that mental shift. I want to look up in a couple years, realize I've EDCed the same knife that whole time, and realize how weathered and worn -- how loved, how used -- it's become.