I think that when you love a critter you come to love the smell. My cats don't stink, except after a fart (and they do fart) and even when the coop stinks due to rain, the chickens don't smell.
I must admit I am not the best at coop cleaning, it is due now, either I add more bedding or sweep and compost the stuff in there. Normally I only scrub it down once a year, and it is that time. I let the litter get pretty deep over the winter and it smelled by spring, but last year I didn't have nest boxes. Think it will be cleaned more often since the babies should lay in Feb, and I think I will have a couple girls lays off and on all winter.
Now my daughter thinks the chickens stink, coop and all, but not as bad as dogs. She's a devoted cat person.