I want to Split at selection. it is useful when editing takes - select desired area and make a clip from it. with the Split tool, it has to be clear what do I want to select before I actually select it. because it will Split it as soon as the area is selected.
I watched a mixing video, using PT, where the engineer was using this pretty often. just one simple click...
I think every command (drop down menus, menus, this setting, that setting...) should be assignable to any key shortcut.