I agree on a few of your points - I dont want children either and had decided that a long time ago, although im only 25 I cant see it changing. I personally dont really like kids, they annoy me - I have a short temper, I know that and recognise that having kids is not for me. But if for some reason I decided to, I know I would want them to have alot of things I cannot provide - money is a big factor, society is another. And I am sick of people saying 'you'll change your mind someday' - I am my own person I know myself very well - no I wont lol.
I think your lucky to have found a partner who shares your views, my partner of 7 years would like to have children but knows where I stand. I dont have a maternal feeling in me at all - its weird but even as a kid I didnt want babies to paly with etc.. I think you have a healthy way of looking at it.