"Attitude en point"
I think in the picture of Alissa Czisny her leg is bent more than it appears from that angle.
Michelle Kwan did not have a very flexible back. It was hard for her to "lay back" and at the same time maintain the classic "attitude position."
Later in her career she went with the lowered leg position ("heart spin"), like Lepisto's.
I didn't like Nancy Kerrigan's hand-assisted spiral at all (although many did.)
I think Michelle (again consciously following Bobek) was the skater who made the spiral into a show-stopping highlight. Before Michelle's time it was just one of several moves in the field that the ladies fleshed out their programs with..