I'm a 5 to 8 knife per day kind of person (less if I don't carry a day bag, which often I do).
I usually have a few nice customs fixed blades that get carried regularly. Usually I have a few traditional pocket knives as well, and often a modern folder. The traditionals and modern folder get used more than the fixed blades.
This is a typical line up. The finger knife is a little box cutter by J. Todd, and gets used a lot. Carried every day. Super handy. AEBL and a real slicer.
The Tendick fixed blades are nearly daily carry.... the larger in a kevlar lined aluminum/warthog sheath. The warncliff is the designated user. Scratches, and all.
I will often neck carry the bigger in that sheath.
I have at least two leather slip sheaths that keep the traditionals from banging into eachother in pocket.
This is a Sunday carry (dinner at the Mother In Laws house). The bit sheath knife is obviously belt carried (but I am not out running errands or 'socializing' with that monster). Though I do stop for gas occasionally with it on.
This is another days carry. The fixed blade Phillip Patton hunter (AEBL steel, has a very trim dangler sheath, that sits low, and visible with an untucked shirt.
No fixed blade this day.
So, I usually have a less expensive knife when I need to cut something.
When I go camping, or am doing yard work chores, etc, I'll almost always have an Opinel on hand for real dirty jobs/gritty cutting.
Often the "work" knife is a nicer traditional, which I don't mind getting dirty.
I've used high dollar knives for dirty work, including castration.
So I'm never a one knife guy. But if I am doing real dirty work, or camping in sand/muck I will alter my cary to knives I am not concerned about getting dirty or such.