After watching Kamen Rider from Kuuga up to Drive, I felt that the innovation involved was this: making Kamen Rider more friendly than it was before. If Super Sentai can go and become lighter and softer after Timeranger, why not Kamen Rider? After seven seasons of nightmare fuel then having lighter and softer series is a huge welcome. Den-O and Kiva were more on the balanced side, Decade well I don't want to watch it again and the rest of them present fun that both children and grown ups can enjoy while watching Super Sentai. Whoever made this funny chart must be a genius!