Well, why don't include a softie in the list?
The question is what is the purpose and which is the camera, as we are not going to develope cults for sub-devices too.
If the purpose is feeling good, then cada chancho a su rancho. It is personal.
If the purpose is silencing, cushioning and stabilizing the camera as much as possible, then all the already mentioned means are suitable and help. How much each of them helps ? It depends on the specific camera.
Thus for example, the panoramic Horizon with a light plastic side grip "Kaiser", achieves an enormous advantage than without it.
On the other hand, a Yashica Lynx 14 cannot be further silenced by the use of a half case, as most of the shutter sound is projected TTL outwards.
For a Contax or a Kiev an original old half case will do the job.
OK, I leave now as there is no much point for generalizations, unless this is an Eureka Luigi thread. Not that he doesn't deserves it, but let's do it by the front door.
Be aware of your particular ergonomic issues and original in your own solutions. "The truth is always concrete".
Cheers,
Ruben
PS
As for Mike Goldberg prefering the metal over the case, the issue is that none of you have an idea of Mike's height and the size of his hands. 🙂
And he still manages to manipulate the tiny Oly RC :bang: