Sometimes you spot something out of the corner of your eye as you're navigating a site and suddenly there's that lightbulb-above-the-head thing again!
Today's singed hair is brought to us by Scott McEachron, in this recent post on the AU Blog.
Civil 3D objects, when they see a "Byblock" property in their style, will use the corresponding property of the object itself. That's why Byblock is used all over the place when C3D needs to create a "Standard" style for you. It gives you a quickie method for say, changing your contour lines to dashed by clicking the surface and setting its linetype that way in the properties window.
Neat! You can read all about it there...