If you want to select all the activities in the task list for example in order to create a lookup, most people will select the first item in the list, then laboriously scroll down to the last item the Shift >Left Click.
CTRL+A also works, but with a long list you're never quite sure don't know when the process is completed as it's off the bottom of the page. I've also come accross some issues when using this method.
Wouldn't it be helpful and useful to have a "Select All" button on all list views to provide an intuitive way of doing this?
Would apply to Task List, Opportunity List (and "History List" if we ever get one).
Would probably replace/rename the existing Tag All in Contact List View for consistency.