What Is that awful saying? Opposites attract. Metaphysically speaking, opposites repel. And honestly, were fights and constant bickering anything to base a healthy relationship off of? A healthy relationship, the kind that usually leads to the soul mate kind of love, starts off with a solid friendship/Relationship – the one where あなた do everything in your power to protect them and keep them happy, even if it means sacrificing your own happiness, standing によって them when no one else will, not because あなた feel あなた should, but because あなた really and truly believe in him/her, and above all, being so connected that at times あなた feel like you're one person – when your thoughts mesh so perfectly that あなた finish each other's sentences and know what they're thinking without saying any words.
At least that's my opinion on the matter. This is why I ship Stelena:)