I never wanted to have kids. Sort of agreed to them with an ex in the past because it looked far away enough (and indeed we broke up years before an eventual "serious talk" about it), but the reality is that it's not something I think I'll ever want. I like being alone most of the time. I value my privacy. I don't think I have that much to teach, nor I think I have the right mentality and character to do it. I don't want to stop doing what I like (be that travelling, gaming, going out, sleeping, drinking or whatever) because there's people I need to look after at all times. Call me selfish, I probably am, but I just don't see myself ever craving for that. Plus I have a hit and miss experience with little kids, and I risk fainting everytime there's detailed talks about surgeries, births, etc. - so you can imagine how well that would go for a father.
Enough people out there make kids irresponsibly (I'm not generalizing, I'm talking about things I saw) for me to want to avoid doing the same. I don't want kids unless I am 100% sure I can sustain it, that I would be a great father, and that I am ready to give up much of my freedom and privacy in order to follow every step or so if one or more kids for at least two decades. As is, there have been already more than enough years of my life in which I didn't conclude jackshit, I don't want to limit myself like that anytime soon. I still want to visit a lot of places, try a lot of things, live my own life as a young adult. Perhaps my maturity will change, but I don't see myself choosing to sacrifice all of this willingly. Again, this is probably a rather selfish approach, but at the same time I believe kids should be made only when both sides of a couple feel 100% ready for the good and bad that's to come from it. I am far from ready, and I'm not sure I'll ever be ready.