The Show varieties seem calmer for the most part, since besides looking the part they have to be calm and easy to handle. Can't really judge a bird that is having a heart attack in the show cage and broke all its feather freaking out. So they are sort of bred for it.
There is a huge character...
Ideal has Exchequer, Red, Buff, Light Brown, Dark Brown and Brown Leghorns. I have Exchequers, Reds and Rosecomb Browns from them and I must say their exchequers are quite nice, lots of white and not so much mottled like other bloodlines. The Reds are nice too, didn't expect such nice even deep...