And on reading my post earlier today, there's another thing (it seems to me) that happens in the more functional systems - that individuals can take on different roles. Maybe for a time the one who is the class clown (usually the youngest) moves into the smart, responsible, angelic-role which then forces the one who is usually the angel to take on some other role or at least not be so angelic. The important thing is the fluidity of the thing. Nobody is locked into something forever. Everybody becomes a jack-of-all-trades in the family dynamics. Then adult maturity comes and there's another role....