Bingowings said:

I don't like the many colours of Lightsaber idea.

For me Republican Jedi (including Dooku and Windu) should have blue blades, Darths Vader and Maul should have red blades, Luke and the Jedi that spring from his teachings should have green.

Yoda and Palpatine don't need swords at all and only Palpatine can do the nifty lightning trick.

There should be a hint that the green blade of Luke is somehow not only a break with tradition but a mystical achievement (he had to think new life into the process of making his blade).

Green represents spring and rebirth so after the frosts of the decline of the Jedi and the fire of the Empire the green shoots of Luke's new Jedi Order should represent something.

If it's any colour of the rainbow Geonosis style battles just become a glowstick rave.

I'd say the battle of Geonosis is a glowstick rave as it is.