I have lots of different sharpening stuff. Lots of diamond, some oil, mostly waterstones. Lots of waterstones. Tormek. 2 Edge Pros. Strops. Pastes. Sprays. Lots of J-knives to choose from and a metric ton of fixed blades and folders. Obsessed, you might say.
The Tormek only sees flower shop knives and scissors (we own a florist). Those get done about every other month. The level of sharpening sophistication that these tools need is not high, as the ladies that wield them are not particular in what they select to cut, be it a flower stem or a piece of wire. They fuss at me for getting the knives "too sharp". Of course, we know there's no such thing....
The Edge Pro Pro sees hardly any use any more as I free hand everything now. For J-knives, I might go to a 5K Suehiro Rika, but most every thing else just gets a 2K edge now. Woodworking stuff like chisels and plane blades get the 8k treatment. Straight razors are a whole 'nuther animal, with films down to .05 micron and stupidly expensive natural stones. Ridiculous.
Everyday stainless stuff, like Forschner, really doesn't benefit much after 1-2k. Zero use for German steel. I used to take everything to 8k or beyond, but now, 2k for "crap steel" as I call it, 5k for the good stuff.
My favorite EDC steels would have to be S30V and M390. I have 'lots' of knives with more 'exotic' steel, but always find myself coming back to these, with the right heat treatment. J-knives, my preference is AS, followed by white and blue. I think I own two (2) stainless J-knives, one in AEB-L and one in ginsanko.
It's ridiculous how much sharpening gear I have, but it was an itch I had to scratch.
I could go on for days.