Most people will never get the chance to have chickens in their yards so they'll miss out on just how interesting they can be.
When I moved to OK 10 or so years ago I had a big back yard, almost 3 full acres, that was fully enclosed by chain-link fencing.
In the far back corner there was a smallish (50'x50') pen that I think was used for a prior owner's dog. Anyway, I was at the local feed store one spring picking up lawn fertilizer and grass seed and they had chicks there for sale. On a whim I purchased 6. I brought them home and kept them in a large cattle watering tub in the garage where they were protected from the elements. They were amazing little creatures and more than friendly enough.
After a few months they were obviously to large to keep in the tub so I bought a 10'x10" tool shed from a neighbor down the street and put it inside the pen in the back yard and built roosts for them, nesting boxes, feed stations, etc.. and set them loose inside the pen.
Every day I'd get up in the morning nad go out there to feed them and they'd all come running from their little coop to see me (they wanted the food of course but..). I'd go back out in the afternoon and they'd all congregate at my feet and I'd throw bugs (crickets and grasshoppers mostly) out there for them to chase after. As the sun would set they'd all head for the coop and climb up onto their roosts.
As they got older they started flying up to the top of the fence and finding their way out into the rest of the back yard where they'd spend the day catching bugs. For some reason they weren't smart enough to fly back into the pen and use the nesting boxes in the coop when they started laying eggs so I just started leaving the gate open when I fed them in the morning. I'd close it again at night when they were on their roosts just to keep any animals that might come into the yard from getting at them.
But, I ended up with 2 huge Barred Plymouth Rock Roosters and 4 hens - 2 barred Plymouth Rocks and 2 Aracunas. The Aracunas were interesting because they laid green eggs but the Plymouth Rocks had all the personality in the world. They'd all be waiting at the back door when they heard me come home from work in the evenings and when I stepped into the back yard they'd all come running over.
Come the following spring one of the hens decided she wanted to brood and I thought the idea of a fresh batchh of chicks would be fun so I collected a few days worth of eggs and but them in one of the nesting boxes. Sure enough, the broody hen climbed up there and proceeded to sit for the next month. I'd bring water and food up to her nesting box so she didn't dehydrate or starve since she wouldn't leave the nest. After a few weeks 10 of the eggs hatched and the new brood started climbing around in the coop. The little chicks were to small to manage for themselvs so I buildt a smaller enclosure fo them and mom to live in until they got big enough to take care of themselves.
In the end I had about 20 chickens running around the back yard for several years. I had one neighbor that didn't like the roosters crowing at sunrise but the rest of the neighbors thought it was great. The bug population in the neighborhood plummeted and they'd bring their kids over to play with the chickens all the time. The coop became a bit of a sight-seeing tour for the neighborhood.
I've had cats, dogs, and now fish as pets but the chickens were really great. Given the chance I'd get a few again and begin all over. I don't think people that haven't had them around can appreciate just how friendly they can be.