Well I'm only 25, and have been married for almost 2 years (august 14th). Even 2 years old I didn't really want any kids at all.
I love cars way too much, want a nice house, I want to travel to exotic beaches and spend time there with just the wife, and all that stuff.
But since I have been married I have changed my tune a lot. Although I'm still not real big on kids right now, I actually want them in the future and (as the future is always getting closer
) as time progresses I want to start a family with my wife more and more.
The only thing is, I REFUSE TO GIVE UP THE STANG AND GET A MINIVAN!!!! 
You will probably change your mind as time goes on, and I think the biggest changes occur after you a married. Just don't rush to get married! Divorces must really suck (on many levels). I can't imagine how hard it would be.
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Driving: 1998 F-150
Far way in Edmonton==>
1995 Mustang GT