Married, or just alone?

Why is being married to someone so hard? I often try to tell myself (about anything) that anything worth having is worth fighting for. Sure, I will agree with that, but does that mean you have to fight all the time?
It is like now that we live in different cities, we live in different worlds. It feels like all he cares about is money, money, money. What do I care about? Well, that one is difficult at present, but it isn't money. He has forgotten what it is like to be a resident. He says he hasn't forgotten, but doesn't like to be reminded about it (he didn't like it either). I was excited about a case I am doing tomorrow and called to discuss it with him. I thought there was a little bit of controversy because so many residents want to be involved and I am being shoved to the side. He says I shouldn't care, that I should just go back upstairs and have a normal day in Obs Anesthesia. He can't understand why I would want to do a difficult case. I said it is because I want all the difficult and horendous stuff to happen now while I am a resident so that I can deal with it later if it comes up while I am on my own as staff!
I feel like I should just stop talking about work with my husband. I feel like all it does is create anamosity between us.
But then, what would I talk about? Work is so much (always has been) a part of my life. Without my work, who or what am I?