Pros: Very funny - curious all the time, talkative
Cons: Picks on the younger ones frequently but never harms them
My two barred rocks are 17 weeks old - not laying yet but soon. VERY talkative, always mumbling. They're also the first to investigate everything. They do get a little peckish toward the younger pullets that are 6wks behind them. Never harmful - just keeping them in line I guess. 
pecking at the barred rock chicks because they will peck on my small white leghorns. (I guess that is kind of mean to think but at least the hens I have don't REALLY hurt the chicks just a few pecks. LOL)