It's definitely a trip, but I love it. Starting a business around it is hard. I applied to YC, but I'm fairly confident I won't get in because I can't live in California for 3 months.
Contrary to what some other people on here have said, I've actually found more time to work on side projects and my startup. If my son wakes up at 330 and wants food, I'll just stay up then and I have a good 3 hours of uninterrupted work time (he'll usually go back to sleep after the bottle).
Having a little boy motivates me much more than not having one. I want to build a successful company that makes me independently wealthy so at some point, I can spend my time with him and the rest of my family.
I also enjoy being young and having a son (I'm 26). I'll be 43 when he goes to college, which means I'll be young enough I could do another startup then.