Only you can answer this for you. But I would say younger, given you know yourself pretty well and have a good idea what field you want your career to be in.

Only you can answer this for you. But I would say younger, given you know yourself pretty well and have a good idea what field you want your career to be in. Yes, kids are limiting. But they also open up the world to you again. You don’t really understand most of art, culture, society until you have kids of your own IMO. It’s not like you can’t continue to have grand experiences, you will just hopefully be having them with someone who you will have a loving relationship with until you die instead of some random person. Also I didn’t want to be unable to ski/bike/climb etc with my kids when they are young adults because I was too old. Raising kids is hard. Be prepared to explore how petty and self centered you really are and be prepared to stop being like that.