You'll have very different ideas about responsibility and personal ethics, and the differences between you are likely to get bigger over time. You define yourself through hard work, strong ethics and a sense of responsibility and determination in your life when it comes to your career, your relationships with your family and friends, and so on. These qualities have been established over your lifetime and they define who you are as a person.
But your amigo will seem to disregard those qualities completely. Traditional values or a conservative work ethic? No way! Not for them. The differences between you will feel like an affront to who you each of you is as a person. Obviously, tolerance will be needed on both sides. If you're to resolve the tension between you, you'll have to learn to respect each other instead of getting mad about the ways in which you don't match up.