This can be a good combination as you are strong individuals who know your own mind. This needs to be a partnership of equals to lessen friction and where you each have control of your own domain. Aries may tend to be the leader in the world, whilst Cancer is just as much a leader in the personal sphere. Your inevitable healthy competitiveness can prompt the best in each other, if it doesn't bring out your worst. Cancer may tend to play the role of care taker, especially when Aries comes home battered and bruised from falls in their many quests for new horizons and also when they win too. The key being that Aries needs to come home some times!