The biggest change for me was the lack of free time to do everything. I can still make time to do what I enjoy, but I don't have time for reading books and wat

The biggest change for me was the lack of free time to do everything. I can still make time to do what I enjoy, but I don't have time for reading books and watching tv and working out and sports and going out with friends. I have to choose one or two things that are most important. In hacker terms, I was running at a baseline of 10% CPU before the kids and could add whatever other activities I wanted without getting overwhelmed. After the kids, I'm running at 40% CPU (90% for the first three months of their lives :) ) and have to be more judicious about what additional activities I take on.