Hello.
First question, are you developing a FLOSS application, Closed-Source Library (for resale) or a Closed-Source Application?
In the last case, I'd stick with naming convention YOU can live with...in the other two cases it is most important that the interface of the code is intuitive. In the first two cases make sure to use XML-Documentation.
Code:
Navigation.Heading.Direction 'leads me to something what points into a direction
Value is used whenever it is logical that the Object has properties and a underlaying value.
Bobby