Minimize Sketch Geometry?

Is it considered best practice to use as little sketch geometry as possible?  For example, when designing a simple, square plate, should you use an Extrude Thin instead of a traditional 4 sided square?  What are the advantages/disadvantages?  I've tried using Extrude Thin to define my simple plates (usually just one part of a weldment) but they are always rejected as "that's not how you do that."

SolidworksDrawings And Detailing