In my short experience collecting military knives, the line between gimmicky and badass is very blurry.
The fact that a knife is designed by a soldier or something more badass does not make it good, first, because a good soldier might not make a good designer, and second, because a man is not only a military badass, he's also a bussinessman.
This is (I think) a good exapmple:
[video=youtube;J5PxLSMIgs8]https://www.youtube.com/watch?v=J5PxLSMIgs8[/video]
He was a "warrior" ; a Green Beret. Does it mean those knives are any good? you be the judge. (oh, and btw, that handle on the fixed is a ripoff of FOX knives)
If you want truly badass warrior knives I'd look into what they use and into the history of the knives. Some examples may be the CRK Green Beret,Spartan Blades, Mission knives,Busse, Cold Steel (yes, Cold Steel), Fallkniven, Mil-Tac (even though I understand most of them are FKMDs retooled) etc.
Some of them are made by ex SF etc.. some of them aren't, all of them are used by "warriors".