I added a visibility toggle script to the tools section. I got introduced to this workflow while I was working at Wildbrain, and have been using it ever since. For me it makes sense to use a toggle instead of separate hotkeys for hiding and showing objects. A nice bonus is that it can show a hidden object and hide a visible object at the same time, which is otherwise a multi-step process. It will also change visibility even if the attribute is locked.
I know it doesn’t seem like that big of a deal, but it’s something I use a hundred times a day, and that time adds up.
If you want to check it out: ml_toggleVisibility.mel