@Motopsychojdn
I started out with a few tools (1992 for computers, electronics since 1988) but you always end up adding little things here and there (it all began as a hobby), I've got stuff that I haven't even listed there like my thermal imager, oscilloscopes, small bore endoscope, misc component racks, vehicle diagnostic dongles and testbooks, spectrum analysers, the list goes on. But the most important thing I've learned is don't lend your tools to anybody, if they don't own it they don't respect or know how to use it.
As for gerber, letherman, sog, their multitools can be a life saver whether for quick fixes or traveling.
Branded tools are great like snap-on and mac, but are really expensive but anyone that has used their tools will swear by them, I personally use them for vehicle service and repair jobs but in my computer toolbox I have standard stanley, draper tools which are more than adequate, as for driver bits I tend to go for Bocsh and Black & Decker, as for battery powered tools I normally go for Maketa, Bosch, De-Walt.