I love my RX100. I use it every single day.
While full-frame gets all the headlines these days, there's no better camera than the one you have with you, and the RX100 fits that bill perfectly.
Despite the small size, this is a very powerful camera, full of features and settings. I like to use it mostly as a point and shoot camera so I try to keep things as simple as possible. These are the settings I use for everyday and on-the-go photography.
I love program mode. Many believe this is a completely automatic mode, but they are wrong.
While the camera will choose the aperture and shutter speed for you, every setting will still be one button away.
For example, in the rare case you want to change the aperture or shutter speed, you can still do so with the wheel. The camera will change both using pairs of correct exposures.
I leave ISO to auto but limit it to the range 125-3200.
To avoid blurry photos, we can ask the camera to use a minimum shutter speed. Mine is 1/60, although sometimes I use 1/30 and even 1/15 to get some intentional blur.
Since the RX100VA lacks a touch screen and moving the focus point isn't the fastest thing, I like to "focus and recompose".
To do this, I use AF-S. A half-press on the shutter button will focus and lock that focal point even if you move the camera. This is how I recompose my iamge.
I use flexible spot (M) to set the focus area, and usually keep it in the center. This makes it predictable, and used together with AF-S gives me a lot of flexibility.
I disabled AEL with shutter to make my approach of "focus and recompose" possible. Otherwise, the camera would lock the exposure when I focus and keep it when I frame my actual composition.
Even though the camera does a great job exposing the scenes, sometimes we want to do something different. I use exposure compensation to tell the camera when to under or overexpose. I use the focus ring for this since I don't do manual focus with the RX100.
I usually have it at -0.3ev to protect the highlights.
Square all the things
My absolute favorite feature in the RX100VA is being able to compose and shoot in square. I'll never understand why Sony is taking so long to add more aspect ratios to their more expensive cameras (as far as I know, only the a6400 and a9 let you use 1:1 aspect ratio), but I'm glad I can do it with this little one.
Black and White
I set Creative Style to monochrome, since I'm pretty much always shooting with Black and White in mind. I increase contrast to +3 and sharpness to -1, so the image I see in the screen and viewfinder resembles a bit more what I'm going to be creating later in Lightroom.
Another amazing feature this camera offers is the built-in 3-stop ND filter. I use it quite a bit when it's bright out and I want to use a wider aperture.
I used to have an additional external 3-stop ND filter, mainly for video, but I lost it in the White Sands National Monument, New Mexico, and haven't bought a replacement yet.
Keep it simple
Modern digital cameras are very powerful tools, but at the same time they can get in our way, confusing us with so many settings and features.
Keep it simple and let the camera manage the technical side. After all, that's why you paid good money for that camera.
As photographers, I believe we should focus more on composition and aesthetics, the most important aspects when it comes to make great images.