The taste isn't that bad, but on its own, I'd give the common yellow bananas a "Meh, but not worth that texture" for taste. I'm actually fine with them in other foods, like, I can eat illness-inducing quantities of banana bread. It's just that the most commonly sold bananas have a texture that in other fruits would probably indicate it's rotten. I've tried giving them another chance several times, but as soon as I take a bite, it makes me start gagging.

I've found the odd variety here and there that were actually better in both regards, though. I remember the grocery store briefly had these little red bananas, about half the size of a yellow one, and I tried it on a whim. Those actually tasted good, and the fruit was firm enough to seem like it was something a person was actually meant to eat.

I assume the common, yellow bananas are just bred to be big, produce lots of fruit and have a consistent flavor, even if it's not a very good one compared to other bananas.