I've only had these 5 week old chickens for 5 weeks, 2 americaunas, 2 black australorps, and 2 RIRs. So far my favorite is the largest of the 6, a red americauna. She seems to be the queen of the hen house and the other 5 generally follow her around. I put them in their permanent coop two days ago even though it's still under construction. Yesterday I opened the maintenance doors, which is a two foot drop to the ground. She was the only one adventurous enough to jump out and explore the yard. I was surprised the other 5 didn't follow her, and more surprised she was able to jump back up into the raised coop.
Least favorite currently are the Rhode Island Reds. Wayyy too skittish.