From what I've read there is a GREAT variety of personalities within ANY breed (except maybe the white leghorns). So, really there isn't a "best" breed becuase you can get a mean silkie or a friendly production red. I haven't had any purebreds and absolutely love the variety of my flock of muts and seeing the interrelations of them all. My favorite of them all is a barred rock that's half the size of the rest and has feathers down her legs - she also seems to go broody at the drop of a hat (3 broody sessions in less than a year and a half!).
I vote you get a rainbow pack or find a local farmer and get some from them.
I vote you get a rainbow pack or find a local farmer and get some from them.