I have a few different breeds, but my Isa Brown's (red sex links) and my Leghorn are probably my favorites because of their personality.
Cyndi, my Leghorn, is very curious about everything, a bit of a goof at times, but is pretty calm and gentle for a Leghorn (according to everything I've read and been told about the breed), but she's usually one of the first to greet me and follows me around.
Joan, the dark red chicken, one of my Isa Brown's, is probably my most favorite because of how chatty she is, she is always the first to come to the gate everytime she sees me and talks to me, usually complaining that she wants snacks. She follows me around chatting at me. If there is ever a problem she makes sure I'm aware of it, she's probably my smartest chicken (I know they say chickens aren't very smart, but with Joan, I completely disagree

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Reba, the lighter red chicken to the left of my Wyandotte, also an Isa Brown. She is probably the calmest most gentle chicken out of all of mine (including the buff orpingtons), she has always and will always have a special place in my heart.
Charlotte, my Wyandotte, I think she is very pretty, and she always stands out in the flock, she doesn't have the best personality. She don't like humans unless I have snacks, she don't like being held, she does get pecky with some of the other chickens and chases them around, it is fun to watch her run because she's a chunk, she tries to fly but usually it's just her running and flapping her wings, and she has a case of RBF so she always looks like she's angry at the world.
Just a few of my chickens. It's hard not to add several more pictures of every single of my 14 chickens, because they are all really great in my opinion.