As Scott Page in Diversity points out innovation is more likely to happen when the group is collaborative and diverse so knowing what labels we tend to have (and according to Multiplicity they change by circumstance) gives one guide to discuss w/collaborators how diverse we are. This is especially vital in a U.S. culture where people with similar world views are increasingly likely to hang out together and thus become more extreme in those views - according to The Big Sort and Going to Extremes... sorry re the run-on... even as an ENTJ I must not be a "completer" :-)