For us, the expectations have been the hardest. We've been married for 8 years, but early on I had to let him know that he needed to buy me flowers, do those "spontaneous" romantic gestures, etc, that made me happy. (uh, not quite the right word.. excited? loved? I don't know, but I needed them.) He did the things that would make him feel loved.. not in a bad way, just that no one talks about the downside to the "Do unto others.." dictum.
Now we do realize we have to go out on our own regularly. We're lucky enough to afford a "date night" weekly, but weekends on our own are very rare. But going out on your own is good, I think especially on a reqular basis. The kids are interesting, but only so much... it won't take long to run out of things to say about them, if you have to do it every week. Then you're forced into normal adult conversation. This is from my experience.. judge me as you will.
I do think it helps if he's really involved with the kids, so the talking about them isn't one sided. Plus, it runs out that much more quickly!
And (wow, I'm going to get judgments here), if you're at home with the kids, ask about his day and listen to it. His day is just as important as yours. This is from someone who can't keep a house anywhere close to clean and who refuses to iron. It's just that I'm saying people should be interested in their partner's life. It's good to know what's going on in the practical sense and the guys (using the gender neutral "guys" ) are great. Knowing them is good for me, also.
Anyway.. I'm getting a bit drunk. What is it that you like about your partner? Redo that. Even if it's not there right now. And, of course, things go up and down... unfortunately much more slowly than I'd like. Ooh, there's a rude joke there.