Super Saiyan 1-3 were my favorite. The Super Saiyan forms slowly stopped being cool when they stopped with the yellow hair. Super Saiyan 4 nearly ruined it but it still had that cool factor to it. But what really killed it and the series itself for me was that Super Saiyan God crap. Seriously there’s only so many hair styles a Saiyan can reach before they reach beyond their limits.