I didn't like children. I wasn't even sure that I wanted children - so I was thinking I would allow myself to be led by my partner, whoever he might be. My partner (now DH) wanted children so I thought - ok, let's give it a go. I was 39. We got lucky, DS was conceived on month 3 and born when I was 40. Right up until the day I was induced, I wasn't sure I had done the right thing - I didn't feel maternal, I didn't enjoy being pg, I didn't know if I could cope or how I would manage to be a mum.
I hated loud repetitive noises - I was talking about buying a pair of industrial ear-defenders to shut out the noise when the baby was born! I firmly believed I would be in the strict camp - not necessarily GF but definitely "my rules, not the baby's".
My only real inkling that I might want children was that I knew if someone told me that I could never have any, if the choice was taken away from me (through illness or accident) that I would be upset.
Then DS was born - and it all went out the window. I didn't experience the rush of "mother love" that people talk about - it was like meeting someone I'd known for a long time but never seen and bonding instantly. I was a hopeless case as far as the strict stuff went - co-slept with DS, didn't leave him to cry for any length of time because he mostly stopped when he was picked up (and because he had an inguinal hernia).
I wouldn't be without him - despite having changed my life immeasurably, including being uprooted from the UK and transplanted to Australia as DH is Aussie, meaning working is much harder than it would have been if we'd stayed in the UK - he is wonderful to have around. When he is being particularly tiresome or I am very homesick, I fantasise about "what if I'd never done this" - but tbh, I wouldn't change a thing.
Well, one thing - I would have done it all 5 years earlier if I could have - because we have been ttc no. 2 for 2 years now and are getting nowhere, and I am getting older and our time is running out. It may never happen and that is sad, because I would quite like another one, DH always wanted two and DS is fantastic with younger babies so would probably love to have a little brother or sister.
So - my advice to you - don't leave it much longer to choose because you might find the choice is taken away from you.