I would make a terrible parent.

I don't think I'd ever be willing to make the necessary sacrifices (financial, temporal, etc.) in order to give a child the environment and upbringing that they would need.

And as someone once told me, a child is the one thing you can't renege on. You can sell a house, quit a job, leave a partner or move to another country but you can never 'give back' a child if you change your mind.

And in a way I think it's good that I know this about myself now. I would rather be aware of the things that would make me a terrible parent and not have to inflict that on a child than have a child (however that would work) and realise only too late.