Images copyright Jordan Chapell. All rights reserved.
I'm deep in the Sony system. As a serial second-hand upgrader via Craigslist/Ebay, I've worked through virtually the entire NEX system (Nex3, Nex5, Nex5n, Nex5r, Nex6), and then the incredible Alpha A6000. I think the A6000 is probably the perfect crop sensor camera if you are into mirrorless, and I've taken thousands of shots on that trusty camera. WIth the advent of the A6300 and A6500, I still think the a6000 is a sweet spot of price and image quality. I'm now shooting with the full frame Sony Alpha series, first the A7, then the A7, now the A7Rii. Throughout these cameras, I've shot with a wide assortment of native E and FE lenses, as well as adapted Minolta, Zeiss, Voigtlander, Canon, and Rokinon lenses from the 1950's - modern times. Some of our favorite images were made with <$25 (or free!) manual lenses that are paired with today's top digital sensors.
For the last few years we have also kept a second-hand Sony RX100 (or one of the following generations) on hand for adventures that require something more compact. I am blown away by the images that can be made by this pocketable camera's 1" sensor. If I could only have one camera/lens, this would be it.
The iPhone - the omnipresent camera. I think the onboard camera came into its own with the iPhone 5, and we take tons of photos and video with it - even when we have a "real camera" on hand. With good light, or in certain conditions, it's hard to beat, especially now with that it can capture RAW for additional processing.