I give DS bananas at least once a day too, as they are a pretty big hit. Pears are my other alternate. So I'm in the same boat.
I'm not really worried about it though. Mostly I mix it with his cereal, and frankly, I've tasted that stuff, and I know I sure wouldn't eat it unless it was mixed with a fruit I like. I just try to give him a variety of other foods too. Like he might have bananas and oatmeal for breakfast, but then for his second meal, he'll get potatoes and peas or yams and carrots and maybe a little bit of pears mixed with rice cereal if he's still acting hungry after he's eaten the other veggies.
I'm not much help, I know, but you're not the only one relying on one or two things that LO eats consistently.