In the pocket? Victorinox Spartan, about five years. Replaced another of the same model. I have a couple of spares, if needed, and sometimes rotate them, not really often.
In a belt pouch: Gerber Applegate-Fairbairn, the large one, usually. Mainly at home, as its image may upset a cop if I'm ever checked. In public, a Benchmade Model 710. Had the A-F maybe 15 years, the Benchmade about ten.
Sometimes, I carry something different if mood suits. But mostly, those are the EDC choices.