Inspiration & Paradox 42: Like attracts like or unlike?

Paradox strikes when I think about chemistry between people. There seems to be two different laws of attraction at work. People say that like attracts like and for a couple to sustain a relationship, they need to have common interests, likings, and share the thoughts and aspirations, but I also commonly hear people say that opposites attract, people look out for attributes which they do not have themselves in their other halves and even argue that opposites can be provide a complementary element in the relationship and they could live in mutual dependency.
Ask yourself how you would reconcile this paradox....