I've fallen in love with the Workplane tool, but I find that there's a limitation that I frequently bump up against.
I sometimes need to drop an object to the opposite side of the workplane. For example, I'm working with an unusual angle and I want to create a hole in the object under the workplane. To workaround this, I have to create the workplane, create the hole object, then elevate it into the object or create a workplane, then drop a temporary object elsewhere on the workplane and then create a new workplane (inverted) by placing it on the bottom of the object.
It would be much easier if I could just create an inverted workplane, possibly by using the "V" key instead of "W".