Amen to this... 3.5 yr old and twin infants here... I haven't been able to concentrate in years. When I have attempted to produce anything of value (in job or hobby), it's been at the expense of my family...
Gotta love the "this project needs to get done, so who's going to be mad at me and how far can I push it?" feeling.
Sometimes friends or family members ask me why XYZ projects are half completed, and it's hard to properly find the wording for "I want my wife to still like me at the end of most days".