What's one thing you and your SO just don't see eye to eye on?
Money. DH thinks 'it's just money' and likes to spend it before he gets it. I have a budget (that I stick to), and I like to save for emergencies. DH likes to get things just because he can or because it's new - ie he currently wants to buy an LED TV, even though we bought a new LCD TV (same size), not even 3 years ago.