There's something to be said for that. My kids do require a lot of attention and work and I sometimes I feel very tired out and short on time to get things done before crawling into bed for enough sleep to be productive at the office the next day. However, even though I really enjoy creative technology work at my job, on average my relationships with my kids give me greater satisfaction than any projects I work on. Maybe not everyone would feel the same way after having kids, but for a lot of us parents I think it's a natural thing that occurs within us that's very helpful for motivating one to give love and care towards a child amidst myriad other demands. I've heard many other parents confirm that they feel something they had never felt before, and that definitely pushes us through the tough times when parenting and provides a lot of enjoyment that might have been difficult to imagine beforehand.