Do you have accessories on your Leica?
I have a soft release, thumb grip and leather Leica strap on my M.
I occasionally use a visoflex or 1.4 viewfinder magnifier with longer lenses.
Some people have bottom plates and grips.
I'm getting a Q3 43 soon and I was looking at different color thumb grips and lens caps for that.
I should add a photo to this post. I will take one soon.
I only use the camera strap that came with the camera. If I go beyond that it is only accessories that assist in taking the picture. Occasionally I will use a visoflex especially when using lenses that are not rangefinder lenses. ie) Leica R, Canon FD. The other accessory I use is when my Leica is tripod mounted and I am doing a long exposure or have attached a telephoto lens such as my Canon FD 150-600mm then I screw in a cable release.
Just an L-Bracket. If you get the Q3-43, get the Really Right Stuff Grip plate if you want to use a tripod, and the Helium Labs Grip (no dovetail) if not. The RRS plate has a QD socket as well.
Digital Ms equipped with hot shoe thumb grib and shutter release button.
Film Ms equipped with hot shoe cover and shutter release button.
All Ms equipped with simple but rigid fiber based neck strap.
I prefer naked for my M10R and M10M. That said, I have a soft release on the M10M that was an xmas gift and stays on all the time. On rare occasions I use an RRS L plate and tripod for night shots and sometimes I use my Visoflex 020 with the 21SEM and 90 APO.
Most add ons make the camera more functional, protected or easier to hold...then there's the choice of color and materials.
I have a natural leather wrist strap on my M4, a brown Leica leather strap on my M10R, a black leather Artist and Artisans strap on my M10M. I often use Peak Design straps on other cameras but I like to keep my Leicas in a classic mode.
I have simple generic soft releases on my cameras I like red ones, brass or bronze or colors other than black. I have several but they are all sort of cheap ones, I have lost a few in the past so I don't like to pay too much for them.
I have a Leica thumb grip on my M10R and a Match Technical on my M10M.
I have a Leica red half case and strap for my M10 but I haven't used them yet.