What power up would u want a character to attain and why

[Skull Knight]

kakashi gets obito's other sharingan eye and chakra reserve.
he would be d strongest shinobi in konoha.:erm::erm::erm:

 

[Fire of Youth]

I'm still waiting for sakura to finally show her genjutsu affinity. Kakashi keeps raving about it but we haven't seen her do a single genjutsu yet.

 

[UchihaNagashi]

Itachi get a KCM, so that he wouldn't run out of chakra in battles.