What the other folks on this thread have said about the magic of kids is absolutely right. I’ll add a few things, when you have young kids (especially more than one for the first 5 years or so) it is difficult to have hobbies (and be a good partner/dad) because the kids can be all consuming. This transition can be hard. But, I have never grown so much as a person, or found so much meaning and joy from anything else I have ever done in my life.