I find myself regularly going through an attribute like Assignee Name and checking the same names (or cloning a report to avoid having to do this when possible), but I think a very useful feature would be some sort of bookmarking system for metrics and attributes.  The same way a bookmark preserves the state of a dashboard, this would preserve the state of filters within a metric or attribute (maybe saved separately) to be applied in other reports.  Something like would save me a ton of time constructing reports.