I grew up thinking I hated Brussels sprouts because my mom never made them. My mom never made them because my dad hated them.
Then one day in my 20s, some friends were having a dinner party and they served some Brussels sprouts trimmed, split, and roasted, with just some olive oil and salt and pepper. I decided to be a big boy and tried them, and my goodness they were tasty. Perfectly seasoned, crispy on the outside, and almost creamy on the inside. I've been a huge fan ever since.
Oh, and nowadays I often make them as a side at Thanksgiving, and my dad has tried them, and discovered he actually loves them, too.