I'm kinda the opposite of you. I'm American and grew up with peanut butter. I didn't try Nutella until my 20s, and while it was ok, I didn't think it was nearly as good as what people made it out to be.

While I don't have peanut butter often nowadays, it's still one of my favorite things when added to sweets, like peanut butter cups or peanut butter fudge. Peanut butter + chocolate is a heavenly combo.