Dave Plumb with BWBR Architects in St. Paul, MN suggested this one to me, thanks! I was just in Minneapolis two weeks ago ironically and didn't get to tip a couple with him, maybe next time!
Walls can be displayed in Legends and Revit provides a preview in the Wall Assembly dialog (making/editing walls). Technically it's a toss up between a Reviteristic and a Subtlety. Take a look at this image, a Legend with a wall and a Wall type preview (section view orientation), the finish side is on the right in the legend and on the left in the preview.
Is it a Show Stopper? You bet...well okay, not really! Just an insight from another Revit user like me who probably doesn't get out much either. Sorry Dave!