The ways in which each of you experiences life are pretty different, and you might not even realize it until you've been together for quite a while -- at which point it could be, in some sense, too late. You have very different ideas about responsibility and personal ethics, and the differences between you are likely to get bigger and more important over time. Your lover tends to define themselves through hard work, strong ethics and a sense of responsibility and determination in their life when it comes to their career, their relationships with their family and friends, and so on.
These qualities have been established over their lifetime, and they define who they are as a person. You seem to disregard those qualities completely. Traditional values or a conservative work ethic? No way! Not for you. The differences between you feel like an affront to who you each of you is as a person -- your lover, as the more traditional partner, feels offended, as if the best things about them are being snubbed; and you feel rebellious, as if you're being manipulated into living by a code of ethics that just isn't yours. Obviously, tolerance is needed on both sides -- which might not be possible, if your values are just too different. If you are to resolve the tension between you, you have to learn to respect each other instead of getting mad about the ways in which you don't match up.