Leatherman PST2. All day, every day since I got my first one with Marlbor Miles about 3 decades ago. Before that I used a Gerber multi-tool and a swiss army knife.
First is the Leatherman Skeletool:
And the second is the Victorinox Classic SD:
I usually carry a Victorinox Super Tinker in my pocket. I have a small Victorinox, probably one already shown on my keychain. I almost never use it and sometimes forget it is there.
If I was picking a fighting knife it would probably be an old Gerber Guardian or maybe a Cold Steel Bowie.
I want an IWB Ka-Bar sheath.
I usually carry a Benchmade.
In my youth I primarily carried a Buck 110. Then I switched to the Swiss Army knife “Tinker”. Carried an Old Timer “Muskrat” I found while collecting pine nuts and used it until I’d sharpened the blade too far down. Switched to a Gerber “Ultralight” for the reason the name implies. Good knife. Then I decided I wanted a little larger blade and went with a Gerber “Paraframe” model, but that skeletonized frame ended up breaking, and I decided to give Gerber a break. Started carrying Kershaw knives and have a few of them now. I really like the assisted opening on them. Opens just as fast as a switchblade. Until I find reason to bail on Kershaw, I’ll prolly keep using them for my daily use knives. I’ve got a few decent custom knives, but they don’t get used for the daily abuse I give the less expensive ones. If you’re not familiar with Winkler Knives, pretty much all his products are first class.
Benchmade McHenry & Williams
Kershaw Blackout. About 5 years old and still sharpens nicely.
Even matches my belt and shoes; and they say men have no fashion sense.