Do you think 2 opposite people complete each other and can be together?

growing apart is why people leave each other, start out that way and you are doomed

I'm in a relationship with someone who is nothing like me and she is amazing! So yes it can work. We complement each other.

Sometimes it's only the outside that's complete opposite. If you two enjoy each other's differences, then it works. And it's not much of a difference. I like sports and she likes lifetime movies, isn't a good example of differences. It means you BOTH like self time.

Saying I like rap and she likes country...isnt a good example. You BOTH like music. And there is at least one song from both genre that each other can hear without flipping out. And if there's one, then there's more somewhere. Find it. And compromise. ..but if it's an absolute hate..how can you ever have parties, get togethers, hang outs with each other.

When we say different...we need to only focus on the negative differences.

IF you HATE each other's style of clothes, music, way of fun etc...then it's obvious you can't stay together. Trying to change someone will NEVER work well.

But if you enjoy the others differences, then it shouldn't even be brought up and you answered your own question

Seems to work with ancient, half dead rock stars & underwear models.

Nobody completes anyone else

No. It would only lead to arguments and relationship drama.

Well it depends on how they're opposite, if they're opposite on their strongly held personal beliefs then they'd never be able to be together. You're not gonna get a couple where one of them is a vegan and the other is a hunter, or where one is a Westboro Baptist minister and the other is a gay rights activist.

Depends on the opposites. Example is if one smokes and the other doesn't, then it is highly unlikely.
Sometimes the opposite can be beneficial or an absolute nuisance.

I dunno, I am doubtful, but where's the option for maybe?

It depends on what you mean, If one is socially extroverted and the other introverted, it will not usually work for very long.