Guys,
Thanks a bunch for your helpful responses. My attitude has always been pretty much exactly as Anssi stated. The hitch being the view for the LA's is more often from above like shown. But it dawned on me reading all this: when a shadow casts on a wall it really is just as simple as a flat horizontal...so there's the rub. A second plus for me is in hidden line and shaded modes, the cut up faces look much better too.
So I've decided to pursue the nice shadow by first seeing if I can develope some sort of pinking shear template so making the shadow doesn't take longer than making the tree (and so I don't fall into using the same shadow for all). Then seeing how much I can cut down the edges and still have something nice. Then, if it isn't small enough still, I will add a simpler shadow component for alternate use...though I do always put the shadows on a separate layer too.
Whadaya think? Any other hints? (Wish me luck driving around today...I'll be looking at tree shadows to distraction :`)
Best, Tom.