Pretty much every study out there says that people are unhappier after they have kids. I don't know if I'm necessarily happier, but I do feel more fulfilled. Day to day life is hard and I often think about how easy things were pre-kids. But there are moments every single day when I think about how much I love Charlie and Olive, and how I couldn't imagine my life without them.
I think my general day to day level of happiness is probably lower, but the highs are higher and I wouldn't change a thing (except have a housekeeper and chef).
What about you? Are you happier after having kids?