Hi. Which knife out of your past collection do you regret selling years ago?
Maybe that can narrow down the suggestions to better accommodate you.
Also, just throwing this out there, consider a 2-4 inch fixed blade instead of a folding knife. If you don't mind a sheath, a lot of EDC fixed blades have pocket sheaths now.
Here's a picture of a Bradford Guardian 3 inch fixed blade with a pocket clip sheath.
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The belt sheath on the right comes with the Guardian. I got the back clip sheath on Amazon for less than $30.
Hope this helps!