These have been my daily carry knives, and my work knives for around nine years. For a few of those years I was working a shipping dock, then I switched to construction.
The fixed-blade is a Wilson Tactical model 25. My criteria when I bought the knife was- around a 5" blade (5.25"), good steel (D2), full tang, micarta or g10 handles that can be removed (micarta, wrapped with a strip of bicycle innertube), 3/16ths" thick (advertised as 3/16ths", but closer to 1/4"), and I wanted it to come with a high quality kydex sheath.
I wanted a blade around 5" long because at the time I was carrying my fixed-blade at work (Entrek Cobra) in a back pocket sheath and I wanted to carry my new knife the same way. And 5" was the longest blade length that I was comfortable carrying in my back pocket (I had experience carrying a 5" bladed Al Mar SERE Operator FB in such a manner). The kydex sheath wasn't for work at the time, I just wanted to have one.
I also wanted a fixed-blade that could handle some amount of prying. Specifically, prying the lids off wooden packing crates. And the Wilson worked great for that task.
Working construction and home remodeling, I use the Wilson for a variety of tasks, including prying, chopping holes through old drywall, chipping away at rotten and termite eaten wood, etc, etc. At this job I use the kydex sheath because it's easy to clean.
As for the folder (Bradley Alias), I regard it as just a light-duty pocket knife. I wanted something high-quality, with good steel (sv30), and I wanted an all metal knife. It was a choice between the Sebenza and the Alias, and I like the Alias better.
By the way Matus, I noticed that you didn't answer your own thread topic. So, what are YOUR most used knives?