To respond to this thread, I probably have to modify the original question, and change the singular expression "camera brand" to a plural form, "camera brands" - as I use and have been using several, for... well, for several years.
I like my Mu-4/3 cameras for their smallish size, and for a handful of wonderful (and generally smallish) lenses. The GX9 deserves special mention for its in-camera l.monochrome.d monochrome setting (to which I am addicted ); the E-M5.iii gets kudos for its surprising (to me) AF capabilities, and general jack-of-all-trades versatility. And my ancient infrared-converted GX1 is still a great little camera. That's two brands already, Lumix & Olympus.
The Fujis have their own addictive qualities, including the best in-camera 'recipes' and color jpeg capabilities of any digital cameras I've ever used (the X-T5), and somehow shrinking everything I could want into one tiny small-sensor package (my X30). Okay, that's three brands now.
Then comes Pentax. My current Pentax DSLR (a relatively compact K-S1) seems to share most of the logical and pleasing-to-use controls of all the old analog film Pentaxes I shot with for centuries, and its generally logical menus never drive me nuts (like those of some other manufacturers). Somehow, Pentaxes always just seem to 'feel right' in my hands. Not to mention that the universe of Pentax lenses, both Pentax-made and 3rd party, is immense and, more often then not, foolishly affordable. And the Q7 has to be the cutest ridiculously-tiny-yet-surprisingly-capable camera I've ever used.
Hmmmm... that makes four 'brands'. I could happily just shoot with them for the foreseeable future.