Before kids, I wanted to be extremely successful and loved working crazy hours, especially on weekends when you get so much done.
I'd still love to be very successful of course, but I'm not as ambitious post-kids due to a variety of factors. I can't work the hours I want/need to achieve those goals and still be present enough to raise the kids the way I want to. I just have so much less energy and time than I thought I would post-kids. And having a family is very fulfilling, and I think I need/want less now.
It may change as the kids get older because I really do enjoy working and want to pursue many more ventures in life. But for now, I am feeling much less ambitious than I was pre-kids.
Has your ambition waned post kids?