Not opposites, but rather complimentaries - people that are different, and, in a way, opposite, but not as in good-bad, but as in one kind of good-different kind of good, and together, as a whole each making up for the other are amazing.
it depends on how opposite they are
If we're talking about magnets, then yes, opposites attract, it's just science. X)
Me and my boyfriend are like opposites, but we both love each other a lot. Although, I don't think it could always work out for some people.
I believe that they attract, but it doesn't always end well. It can go well, though, just not always.