Dean, while it's not a hard, fast, written rule that you MUST face your audiences, I consider eye contact with my audiences a very important aspect of any performance. Without it, they may as well be listening to a radio.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)