Here is the progression I've followed over the years:
Leatherman PST (Pocket Survival Tool)
BuckTool
SOG PowerPlier
Leatherman SuperTool
Victorinox SwissTool
Gerber Legend (Multi-Plier 800)
In each case I switched because I liked the new one better than the one I had been carrying.
I started carrying a PST as soon as they first came out. It was kind of an "upgrade" to the Victorinox Champion I was carrying.
The BuckTool had a much more comfortable grip than the PST and it had locking tools.
The PowerPlier did, as its name implies, allow me to exert more force with the pliers. The tools did not lock, but I still felt that it was a significant improvement over the BuckTool.
The SuperTool was my first real heavy-duty multi-tool. And the tools locked. This was a big step forward. The cost was greater size and weight.
The SwissTool was the first multi-tool that met my long-time desire for locking tools that open while the pliers are closed. To my taste the design is almost perfect.
The Legend offers a somewhat more flexible set of tools than the SwissTool. As a bonus, the Legend is quite a bit lighter than the SwissTool.
Do you think I'm fickle?
Someday I will probably find something I like better than the Legend, but of all the multi-tools I have carried and examined the Legend is my top choice.
--Bob Q