For me, the M6 body is too thick, too tall and too heavy. And on the M6, the release point for the shutter is much too far into the travel. That is, you have to push the shutter release almost to the end before the shutter released. I missed a number of shots because I had pushed the release to what was the usual point of tripping the shutter, but I had to push another fraction of an inch. I found this really irksome.
I know that I could use a soft release, but why is it necessary to compensate for poor design? I also am not a fan of LEDs in the viewfinder.
I had wanted an M for some time, and I bought it from a shop owner. He was the original owner, and the camera had been lightly used.
I think the build was impeccable, and of course was very sturdy. The Summicron was a terrific optic.
I just couldn't get on with the body, so I eventually sold it to someone who I hope has made better use of it.
There were many things to like about the M6, but the few things that I didn't like outweighed the good., which was a shame because I think Leica makes excellent cameras. I still have my IIIf, which is another case of mostly good and some bad. The bad being having to trim the leader, two shutter speed dials, a shutter speed dial that rotates when you trip the shutter, and separate windows for focusing and composing. And the good being excellent build quality, a small svelte body and a quiet shutter.
Our love of cameras is very individual and aspects that I like or don't like are just the opposite of other photographers.