Onions are one of those rare foods that offer intense flavor in two directions: sweet and spicy. Not to mention, their flavor, when muted down by cooking tends to enhance most meat flavors (chicken, beef, lamb etc). I hated onions when I was younger, so I can sympathize, but they've grown on me and now they're one of my favorite foods.

By the way, I'm not trying to preach, you really should try to acquire at least a tolerance for them. There's something in them, and their cousin garlic, that's supposed to be great for your heart.