Back in the day, I (like a lot of guys) kept a Gerber II on my web gear, off side, upside down.
I tried to go all out once ordering an expensive hand made knife from Mike Irie online while in Iraq. It came in the mail, and God was it beautiful. Fit my hand well, good long recurve fighting blade. I loved it. Took it on a couple missions, but after getting a nick in the handle, I got scared, and left it in the tent... It did come in a crappy sheath. Ended up sending it home... Sad thing was I got blowed up later in the deployment, couldn't work when I got back, and sold it on Ebay. Now I'd pay through the nose to have it back...
Then I ordered another... This time the MOD Mark V ATAK, from the Bkaclhawk website... (hey, Blackhawk was big back then) D2 tool steel, so it was gonna be tough. First off. The handle was, and is the most comfortable knife handle I've ever had in my hand. I just want to walk around with the damn thing in my hand all day. The little prongs on the hilt for prying, and "combat" are gimmicky, but they never really got in the way. The blade was tough as hell, and I used it a lot, though more as a utility knife than anything else. I just didn't see a lot of "hand to hand" combat, though I did shoot people. I will say that the company did stand behind their product. I was in my 40s on my last deployment. Done with tanks, and Infantry... I was a section sgt of a transportation unit. (88M... yes, a truck driver)
So on one mission I had a pallet of water leaning way over the side of my trailer, and my driver couldn't see the gun truck behind us in the mirror. I had to climb out of the truck, onto the trailer, and cut it loose, as we ran down MSR Tampa. When I was coming around the catwalk behind the cab to get back on the truck, the knife sheath (on my body armor) just let go, and fell off. (with the knife I had just used in it) Of course we couldn't stop, so Haji gets the blade... I emailed Blackhawk, and Michael Janich emails me back. They don't put locktite in the screws of the sheath so the end user can change over to left hand if they want. From now on they will. He sent me a new knife.
This one I carried around a lot. I picked it up at the PX after I lost the Mark V. I never got a Kabar before because they were a Marine thing, and I was Army, but I needed a fixed blade... Guess what? This one said U.S. Army on the sheath. I took the little retaining strap off the sheath, then stuck the blade into my right pants pocket, and with the belt loop through the sheath my DCU blouse would cover the handle. Nobody could see I was walking around with a 7" long fixed blade. When I sit down, the sheath could bend since the handle wasn't strapped to it. The TCNs wouldn't be afraid of your weapon because they knew you wouldn't shoot them, but you whip out that blade...they'd quit stealing ****. I can still carry like that today with jeans, and a big T-shirt if I want.
These days, for my fighting knife, I have went back to my roots and gone to a smaller dedicated dagger style fighting knife. I keep a Boker Applegate Fairbairn on my 1st line belt in a custom Kydex sheath I had a guy make for me. Being older, and half crippled... I doubt I'll ever need it, but hey...
I still do love the feel of that handle on the Mark V though. Nothing like it. Very tempted to cut off the little wings, and get a custom sheath made for it...