Highly discussed in our team is the question: Should all parent navigation items be clickable, or only the ones that have no child menu appearing on mouse over? At Starwood Germany, we  would like to adjust the main navigation for all our websites in order to improve consistency and user friendliness. At the moment, most of our websites feature both clickable non-clickable parent items, depending on whether the items have a corresponding child menu (appearing on mouse over) or not. See example here: http://www.imperialvienna.com/en Some of our team members believe it might be irritating and/or confusing for the user if some items are clickable while others are not. What do you think? Any thoughts and insights would be truly appreciated!