I don't want to offend you, but.....
No offense taken Charles. And everyone else makes a good point: lighting from the NW is usually best.
I guess in my case I often feel the need to make an exception because I am trying to make points about vegetation, and really I should just inform my audience that radiation and realistic lighting is a thematic layer. What I often am trying to point out is that in high latitudes, the heat and light of south facing slopes allows the establishment of annual invasive species.
But maybe I can still do this with normal shading?:
Sorry about the hideous color scheme, not what I normally use, but blue is poor habitat for our weed, red is good habitat for our weed.
In any case, google-style is really one of the simplest hillshade methods, and is probably great for general audience maps these days because everyone will instantly recognize it.
Plus, Google has made explaining what I do for work to people at parties much easier!