Cheshirekat, I agree that green bell peppers are yucky. I used to like them until the day I had my first red pepper. There's no going back.
Of course, green peppers are unripe peppers! It's possible that if you leave a green pepper on the vine until it changes color, it will get sweeter, or at least less bitter.
But best to grow sweet peppers "designed" to be eaten red. There are a lot of Italian sweet red peppers.
