I'd say personally, it is way too early to say anything for certain, but what I consider the ideal would be 2 children. While the thought of raising a child seems a bit overwhelming and not something I feel like I'm ready to devote my life to, I do feel obligated to do it by the community and the state. While I consider myself more anti-nationalistic in general, it's still a duty to keep the generations going. Since the amount of children needed to keep the population stable is 2,1 per woman, I feel like 2 is a good number.
I really doubt I'll ever (want to) get married, though. I don't think it's a necessity in today's society, and I have no religious beliefs that would drive me to get married. On the off chance of finding a girlfriend who really wants to get married (for religious beliefs), I'll do it for her sake.