hahahaha!! got any links to the "snarl of passion?
it's a tricky thing. Probably the key is to get the technique down and really learn you program. Only then can you start thinking about facial expressions and such.
I remember one too many times dancing and being so nervous that "facial expression" basically came down to plastering a jack-o-latern smile on my face until I left the stage. But that is why I was a total amateur and Michelle Kwan is star.