Advance Multi-Select - Obsolete?
You may be thinking of the old multi-select widget, which required Ctrl+click. The new one is much improved (I think it was refreshed in 4.5) using the popular Select2 widget. It does find-as-you-type, and as it narrows down the options you can either click or press enter to add that option, then continue with the next one. You can also click in the field for a drop-down of all options (except the ones you've already chosen). Give it a shot on the Civi demo site; I'm sure you will like it.