I'm married for 16 years without kids; not that we don't want to but we also have difficulty conceiving. Our adoption plan did not go smoothly; waited more than 2 years for a child in China only to be told that there is a sudden influx of adoption and not enough babies! We didn't want to go to any private adoption agencies for fear of baby trafficking. We are already in our 40s now and have come to accept we will be childless till 'death do us part".
It helps we have a lot of common interests: swimming, running, hiking, white water rafting, watching movies. I also know most of my hubby's friends and colleagues, so when they have a gathering, I usually join in as well.
Now, we are toying with the idea of joining MCYS foster parent scheme. But we would need to iron out two big issues first: my working arrangement and my mother-in-law who lives with us. We do not know how she will take to it because my MIL is basically quite a self-centred person. She may also have to "share" her bedroom with the foster child since our only spare room has been converted into a study room with fixed bookshelves and work desks. As it is, I don't have a good relationship with my MIL so having a foster child in the family is going to complicate matters.
So, back to the question. I think it will help if both partners have common interests and VALUES in life.