I think when you have spent 5 - 30 minutes symbolozing your data. It would be great if you could also calculate area, not just the counts in the symbology tab. Other wise if you have spent all this time grouping data for aesthetics. You still (in some cases) need to generate areas on the new groups created. In order to do so, you will have to mannually select the fields you want from the attribute table or with queries. Which on my data sets, takes a long time.