I started carrying the Emerson Commander in 2002, coupled with the Spyderco Delica. Carried those for a long, long time on duty and off.
I replaced the Delica with the newer all black Delica two years ago. Really only did that as the pocket clip on the older one was coming loose from time to time.
I added the Tenacious in as an off duty carry knife along with the old Delica. The Emerson and new Delica stayed with the work gear.
I added the Hinderer probably two years ago, I started carrying it on duty but I was always concerned about losing it or leaving it in a lock box somewhere. It’s actually been carried very little.
I decided the ZT 0350 was next, so I promptly dulled up the combo blade on the first one at a crash scene. I ordered a plan blade so I actually have two of the (combo blade not pictured) that I carry on duty. If I lose one or the blade needs sharpened I can simply trade one in and out.
The Purple or Blue, Blurple they called it ParaMilitary 2 is a recent addition. I’ve been carrying it or the Tenacious off duty.
There been others, a CRKT, a KaBar TDI folder, etc. This main group is what I either always went back to or picked up more recently.