I have owned and still own mostly GECs (60%) followed up by Case (25%). I have a few Victorinox and Wenger-Delemont SAKs (5%), a few Queen made knives (5%), Opinel (2.5%), custom makers (2.4%), and a Boker or two (.1% lol). If one exempts the traditional prerequisite of this sub-forum then Spyderco comes in a close second behind GEC in my edged tool collection and carry rotation. Of the 30 or 40 GECs that I own most are in 1095. I have had a couple in O1, retained a few in 440C, and one 420HC.
I carry traditional knives over moderns most days because of my work environment and daily office needs, and I enjoy the aesthetics of traditionals. I do, however, prefer modern folder over traditionals in the utility and steel choice aspects. I enjoy not having to constantly maintain the modern stainless steels (and, hell, even the non-stainless steels like CPM-3V, CPM-M4 and Maxamet). They do not rust like 1095 does and require very little maintenance. Anyways, I digress....
The list of knives that have passed through my collection, whether kept or not:
Boker
Buck
Canal Street Cutlerys
Case
Custom Makers (Van Reenan, Toole, LaRock)
GEC (and all of their sub-brands/SFOs)
Lion Steel (if they count?)
Opinel
Queen/Schatt&Morgan (Northwoods, Trestle Pines, Moore Maker, Cold Steel, etc.)
Victorinox
Wenger-Delemont
And probably a few more....