I was a child whose parents said they would divorce once all the kids were out of the house. Fortunately, once we were all out it got better for them and they remained married until my Mom passed away last year. I don't believe either had regrets about staying married.
I think it is important to talk to your DH about things that bother you. If he is wanting to work things out, he will try. Also, be realistic...marriage isn't a Cinderella story. DH and I rarely laugh at the same time, he has a different sense of humor than I do. We also have different hobbies, but try to enjoy them with each other. I even agreed to golf once with him, which I am sure we will have to do this year. Do I want to golf? NO WAY! Will it kill me to golf, no. I pick my battles with DH. We don't agree on the discipline for our girls, but I have voiced my concerns (when they are out of the room) and he has listened. I would not divorce DH as long as he is loyal to our marriage, not an alcholic or an abuser (physical or emotional). I made the decision to marry him and will do everything in my power to make it work and to be happy in my marriage.
I have found that true happiness can only be achieved if you don't make it dependent on someone else providing that happiness. You need to look within yourself for that happiness.