Color: The color of the ki. I based it off of this topic. http://www.kanzenshuu.com/forum/viewtop ... =8&t=23504. I believe the ki color is chosen by their mood(credit to Insertclevername), their alliance(Pure, Good, Middle, Bad), and intentions of attacks. For example Freeza's attacks are mostly dark colors. Purple, Dark yellow-orange, black, and dark red. His alliance is purely evil. Generic attacks are mostly yellow. I think this is because of their intentions can be used for both ways. A simple ki blast are used to distract, basic damage, or randomly used(Vegeta ect.). I notice most of Goku attacks are blueish white. This is to show his pure of heart. His main attack the kamehameha is whitish-blue and sometimes even his basic ki blast are blue. When he gets angry his attacks change to yellow. This might be cause of his change of mood and now he's alliance is in the middle. Looking at Piccolo however his ki blast are purple and yellow. I think this is because he was once evil and now he's good. Mixing himself into the middle causing yellow ki blast. Yamcha, Krillin, and Tien all have yellow ki mostly. Each was once evil but now is good. I hold Cell as an exception of this rule as he's a mix.
Size: The size doesn't effect the power of ki. As we've seen many times. Sometimes it's more of the aura that surrounds the ki then the actual ki. This videos talks about it. http://www.youtube.com/watch?v=bz2iorS15BE. Yes he's using Tenkaichi 3 auras for example but I think it applies. A lot of times the aura is what causes the size of ki to the eye. So it's possible that the aura of Boo's planet burst made it seem bigger than it actually is. However it's still big as the aura is just bigger. The Revenge Death Ball isn't as big as you think. It's quite a medium size. The aura however is HUGE.
Shape: Now this is a challenge for me. What exactly causes the shape of ki blast? Is it random? The way you charge it? It seems like all ki blast starts off as some form of ball shaped object even the Makankōsappō
Thanks for reading my thoughts and theories about ki. Hope this somewhat makes sense. Through I doubt it's 100% accurate or helpful. But I at least hope it was higher than 40%.



