Let's see, my list of Leatherman tools that I own is a MUT, a Supertool 300, a Surge, a Wave, a Charge TTi, a Skeletool CX, a Freestyle CX, a Freestyle, a Style CS, a Squirt ES4, a Squirt PS4, a Micra, and a Style. For some reason they just push my buttons and I gotta have 'em. I also have a couple of Victorinox's. I have SwissTool Spirit Road Tour and the SwissTool Spirit. I have a SOG Powerlock EODw/V-cutter, and to top it all off, I have a Gerber Shortcut.
So Leatherman is definitely my favorite, perhaps due to the variety, but Victorinox is definitely a close second.