Op, I'm 46 and don't have DC. I think it's easy to want them when you see the classic Kodak moments - shrieks round the Christmas tree or on a summer holiday building sandcastles, but of course that's very far from the whole story.
As this is MN, you'll get lots and lots of people telling you about the upsides of being a parent. As a person who doesn't have DC, I'm here to tell you about the other fork in the road.
Because of your age, many of your contemporaries will have small DC - often when they are at their most cute and attractive. As you get older, the DC will morph into sullen, stroppy teenagers and parents become slightly less soppy! 
I can also remember going through a phase when I was in my early thirties when it seemed like everyone around me was giving birth. All the time. It seemed almost impossible to escape - rather like being incorporated into the Borg.
Now i'm in my forties the picture is very different. DH and I have a wide and varied set of friends, some are parents, many are not. We have built a life together of conscious choices about work and time, which allows us to do those things that are important to us - for instance, I have spent most of the last week working like mad on a puppy farming consultation paper. We enjoy family get-togethers, have nephews to stay regularly and regularly care for older relatives. Last year and the year before I spent a lot of time with a dear friend who was terminally ill with bowel cancer. She passed away in March but I was so pleased that I had been able to be there for her, both to enjoy her company (i still miss her) and to provide help and support.
I think what I'm trying to say, probably not very well, is that when you don't have children, it is still possible to be an important part of a family, to be a supportive and valued friend, to do work of meaning and value, to have a life built on shared values, filled with happiness and contentment. Of course there will be sadnesses (such as bereavements and ill health) but life is very precious and wonderful. Ironically, we have three much loved dogs so we experience many of the ties associated with small children and a great deal of the mess. Everything in our life is there because DH and I want it to be - as a couple our values are very important, and from these, flow our priorities in terms of what we do, how we organise our lives and our resources. If you are lucky enough to be able to live with integrity in a way that is congruent with your values then you will be happy and you will probably find the decisions about having children fall into place.
Good luck, and I wish you happiness. 