having separate lives in the work place is healthy. being with anyone all day is bound to get difficult. very few people can work with thier spouse,go home together and get up and do the same thing again. Do what works (no pun intended) for you both. good luck to you!
Sometimes it can be fun it will be nice if the both of you can talk about what went on through your day if you work at different jobs and it also give you time to miss the other person if the both of you did work at two different jobs
It's never a good idea to mix business with pleasure. Working with a spouse will almost always lead to bickering especially if they feel threatened. By threatened I mean if you do not side with them, you get a promotion before them or any number of things. you need to separate your personal life from the work environment. While at home you are husband and wife, however, at work you are coworkers.