User blog:Xouzoura/What colour of haki do you think Luffy will decide to improve the most ?

So far Rayleigh told Luffy that he will teach him the basics and then he will decide what colour he's better at. I believe his decision will be Busōshoku Haki (武装色, Color of Armaments), so that he can attack more easily logia types and stuff! what do you think