Earl, interesting point you make regarding style and energy being appropriate to what a singer is singing. If all it is is "words" then "it doesn't matter". But, when a singer is sensitive to the song, the appropriate nuances will form themselves around the words and notes. My voice teacher is a classical opera singer, but what I have learned from her in technique includes when to use a chest voice and when to use a head voice; when to lift different muscles in the face to change the color of the voice. At the Irish session I go to, I wouldn't sing a drinking song or a sea chanty the same as a lullaby or love song. The shouting of adolescence (like two year olds) is part of the rebellion and anger that the age needs to express. As people move through different stages of life, they change in their manner of expression. Alice