I have been married approximately seven years to a great gal. *steps off podium*
We both did not want kids and still do not want kids. Which works for us. Some folks have actually told my wife, "how greedy"! If you can believe that. Then those same folks we see later on stressed out and they just don't know why.
Just like driving a car, flying a plane, or being captain of a cruise liner is not for everyone... I feel it's the same way with kids.
Maybe this approach will help you make "the right choice":
1. hang out with friends that do have kids, for extended periods, even baby sitting for them! (ack!)
2. Become a Big Brother or equivalent in your area/country if such is available.
Finally, a decision based on several factors is best. Like the point you made about job concerns, which leads to money concerns, living arrangement(s), and on and on.
Just don't rush into it if you can at all help it! 