What Do You Constrain?

There are so many opportunities to 'constrain' things in the Revit model. Every time you use Align tool, there is a lock to constrain. Every time you dimension you can use the EQ function or lock the dimensions. TheWalls can be constrained to Levels, Floors to Walls, Ceilings to Walls etc. Then there are details, would you constrain 2x4 Detail Components to the 3D walls in a plan detail?

I generally have found constraining to be more trouble than it's worth most of the time. In a perfect world where I can remember all of the constraints and their implications they would be great but...

Please take a look at the poll on the sidebar and vote on what your view is. Also, you can comment on this post on things you have found worth constraining.