Pros: quite, calm, non aggressive
Cons: tend to get "fat" and stop laying
I have one bantam, Buff Brahma, Goldie My-ear, because, to me, she looks a little like a certain lady Prime minister of the last century. :) Goldie is the largest of the bantams and is almost as big as a regular hen.
I find she is VERY calm, but isn't particularly friendly, although she allows me to pick her up and tolerates hugs. She has NO aggression towards people.
Goldie is very quiet, softly talking to herself and just hanging out. She started laying at about 51/2 months and has been pretty regular, laying nice size speckled light brown eggs. Since she has gotten a little older (she's almost 4) she has tended to get a little "fat", which, from what I understand, is something some Brahma's tend toward, and has stopped laying.(she normally laid year round). It's early spring, so she hasn't been boogieing around as much (although she not a big "mover or shaker"), but I've "kicked" her outside and have been making her move more and it looks as if she's going to start laying again.
I have recently order 4 more chicks, their calmness and quietness has impressed me that much.