I don't get these people who say "have them young so you can get your life back whilst you're still young ".
The whole point of having kids is that you are ready to shape and mould another tiny human, show them what you have learnt, create a family. Go on adventures with your kids, family holidays, school plays, movie nights, dinner fights.......family life.
If you want to have kids to 'get them out of the way' so you can go back to your previous lifestyle I think you're missing the point imo
I had dd at 30 after having travelled somewhat, as pp said if I did everything then I would of never been ready!
I think it's fun to travel and explore different cultures with dc.
In regards to career however it is a little trickier. After having a baby your priorities shift massively and it's just more difficult to work harder to get a promotion because you're constantly battling childcare issues and illnesses. Not only do your dc catch everything going at nursery, they give it to you too!
You really need to be on the same page about this. If your relationship has cracks, even tiny hair fractures, I guarantee a baby will show them all up.