I seem to have lost your original thread on the boards!!
I recall that the thrust was "I'm happy with my life - why should I have a child ruin it?"
Well, it depends. No, you're life will never be the same. That's for sure. Having a little one changes everything. And I mean everything. Your opinions, your money, your time spent, the car you have, how you view the world, friends you have.
Children DON'T ruin your life. They are a portal to expanding your life. If you reamin in your mindset, you will just get "more of the same". THAT isn't what growing up, and growing older is about.
Your post, as I recall, details concrete stuff - habits, organisation etc. Children blow a lovely big hole in all of that.
eg. when dd was born, amongst my very first thoughts was "I am now meeting somebody who is MUCH more important than me."
Children educate you. About yourself. Are you willing to be educated??