Weird, mine hated bananas last time I tried that.
Their favorites seem to vary by season...
WINTER: "hot mash"- layer pellets softened with warm water, with cooked rice, corn niblets, oatmeal, and raisins mixed in- I try to feed this an hour or so before bed to fill them up on cold nights. Cabbage tetherball also keeps them entertained, and they love kale and arugula in a suet feeder for something green to pick at when there's nothing but snow in sight.
SUMMER: Any kind of live bugs, worms and moths are a favorite. I can't think of much produce they don't like (except those bananas!) but they will tear a watermelon down to the thinnest strip of rind in no time. They also love corn on the cob. On really hot days they get watermelon mixed with frozen blueberries and grapes to encourage them to stay hydrated. They also love a big, whole sunflower to strip the seeds out of in the late summer.
The one thing they really hate that all other chickens love is pumpkin. They let those things rot in the run until I took them out, and turned their nose up at the seeds too.