In the past, back when I was a bush hippie, I used a Rapala fillet knife for all cutting chores - fillet fish, cutting up vegetables, assorted kitchen knife duties,whatever. Whenever my knife got too dull, I'd go buy another one. 30 years later, for the most part, I still do that.
I've tried different sharpening systems over the years, and while they work ok, the "razor sharp, dry shaving edge" that you hear so much about is unattainable by me. I think I've got a blunt thumb or something.
I've got the Chef's Choice electric sharpening system. I've got the ceramic rods. The little hand held mini ceramic rods that came one time with a fillet knife I bought work as well as anything. I don't know.
I do know that for some cutting chores, there are better tools than knives. For parting out chickens, a heavy duty pair of kitchen shears works as well or better than a knife for me. I know that for slicing roasts, using my electric fillet knife, I can get much more consistent slices than I can by hand and a new set of blades for that electric knife only costs $10 or so.
If I have to slice up a bunch of chicken breasts for chicken stir fry, (one of my favorite summer crowd dishes) it is easier to freeze them and then cut them into slices using my electric slicer than it is to do it by hand.
This blunt thumb of mine applies to yard tools as well. I have a dremel sharpening set and a variety of files and stones and still I have issues getting yard tools sharp. I know that it is important to use sharp yard tools. It is a good thing that I have a buddy that likes to hunt on my property. I put him to work sharpening all my yard tools and he's done in 40 minutes or so and they are all sharp for a while.
Some people just have "blunt thumbs" when it comes to sharpening knifes and tools and I am one of them. I've managed to recognize my shortcomings and adapt over the years, but it is still a pain. The funny thing is that I am pretty good at filleting fish, when I've got a sharp knife - go figure. When all else fails, go buy another Rapala fillet knife.