Well for me it started back in 1998, now even though before I had owned many knives and a few SAK's and cheaper versions. For me this is a long story so I'll shorten it.  Before my father left  in 1998 (I was 9), he got me a Leatherman Wave.  This is the only gift I ever remember him getting me. This tool has always amazed me as its got everything I've ever needed in a MT.  Leathermans are amazingly made and with the warranty you know you have back up if anything goes wrong.  I can't recommend Leathermans enough. Mine holds sentimental value. I was recently given a PST - what a lovely made tool - plus I have a Kick with a clip attached that I carry every day.  This is a very lightweight useful tool.  For me there is only one Multitool to buy.
 

Paul D.

Dorset, UK