I gotta say, green and yellow are my preferred lightsaber colours, blue is just too vanilla for me.
However, the idea of all Jedi having the same blade colour is growing on me. It makes little sense to me for a religious organization based upon ideas of stoicism, asceticism, and the wickedness of humanity and individualism to have something of such iconographic value be so easily made different to an individual’s taste.
Then again, the same could be said for hairstyle, clothing, and hilt shape.