I started with a Kodak Holiday Brownie and 127 Pan X film in the early 60's. My first DR was an Ansco kit from Sears with universal developer and a contact printer. By the late 60's I was using Kodak products nearly exclusivly. My camera of choice by then was an Argus brick followed in 1969 by an Olympus FTL and a Yashica D. Still used mostly Kodak and Agfa papers with Kodak chems into the 80's.
These days I use Pyro developers, along with D-76 and Rodinal for film. I use Ethol LPD for paper and Ilford, Forte, plus Fotokemika Emaks and Varikon papers.