I have to say the grouchiest breed I have ever raised was Silver Laced Wyandottes. They spent a lot of time making the whole flock miserable!
I've had some hatchery quality RIRs that were like that.
And I've had Black Australorps like that (which 99.9999% of owners will tell you is a wonderfully perfect bird).
Just goes to show, there are traits associated with each breed but those don't necessarily hold true for each individual bird within a breed. There's always that wild card or two!