IP - a friend of mine didn't get married until she was 30 (her husband 34) and they now have 2 little boys 4 and 2 years old. I say that I don't think I could keep up with little kids anymore, but that's because mine are older! If you can't fix yourself a "sandwich", put your shoes on, wipe your own butt, and meet me in the car - then you are too young for me!! (babysitting is different, you get to give them back)
There is definately a plus side to having kids later, when you are settled and are more financially stable. My kids missed out on a lot of "fun family vacations" because we were not financial stable. So, don't get down about it. I'm sure you will find that special someone and have some kiddies of your own.
So, eat your wheaties and get the roller skates out, because when you do have them it will be non-stop. But I wouldn't give the world for my kids or the experience. Well there is the oldest, I might be tempted to give him back , ok, ok just kidding!
nj