There will be a lot of respect between you, and you'll have a grounding effect on each other's thinking. You aren't likely to get caught up in romantic fantasies about each other or the relationship; instead, you'll view each other realistically -- a real boon during disagreements. With such a grounded, sensible way of communicating, you'll be able to work together through any problems that come up during the course of your relationship.
In general, you'll help each other make more rational decisions than you might on your own. You'll keep each other well within the bounds of logic, and you'll rarely try to take on impossible tasks. Therefore, you'll be able to plan well together, and you're likely to make good investments as a team. The projects you undertake together should be successful because you'll be so strong in the planning stages. Just make sure to continue challenging yourselves and each other at an intellectual level. Don't be afraid to take mental risks or leaps. Creative thinking is every bit as important as reason and consistency. Most of all, don't forget the importance of passion and pleasure! If you're too calm and reasonable with each other, you might forget that there's a lot of love and energy between you -- which is there to be enjoyed.