I EDC'ed a PST from 1992 until 2008, when my wife got me a Skeletool. She had given me various tools over the years (Craftsman version of Schrade ST5, Kershaw A100, Original Supertool, Old style Wave, Gerber Evo 650 ) but they were either too bulky or more awkward than the original PST.
The Skeletool was the first tool that was actually handier (to me) than the PST. Very high praise indeed.
But honestly, now I'm spoiled and want OHO tools and locking tools, especially drivers. These days, the Wave/Charge series are my Multitool of choice.