It’s an age-old mystery: Why opposites attract. And the question follows: Do opposite couples last? We tend to seek out personalities similar to our own and to fall in love with people like ourselves. The idea of two wildly different people meeting, bickering and ultimately falling in love makes for a great movie plot. In reality, mismatched couples rarely last. Look at the 20 month marriage of Michael Jackson and Lisa Marie Presley—the differences were just too big for the relationship to endure.