My chickens seek me out for cuddles; they can actually be annoying because they are so clingy! My clingiest by far is my buff orpington, Peeps, who, whenever I crouch down, will run over to me and snuggle in the crook of my neck (and won't leave me alone!). The other clingiest chickens are my ISA brown, black austalorps, and my orpington/ISA brown/australorp crosses.
My other chickens aren't so clingy, but still enjoy attention... those are my barred rocks, wyandottes, and easter eggers. I've found the majority of my easter eggers to be more independent, but of course, there are exceptions to all breeds, as I remember a particularly aloof buff orpington of mine a couple years back.
My ISA brown Sandy is one of my best friends in the flock, as she is so smart and kind.
As far as roosters being friendly, I had two cuddly roosters, one being an olive egger/barred rock cross, the other being pure black australorp.