It's like the salvation of parenthood.
I always (usually) adore my kids. I really do find them delightful, at least 70% of the time.
But when they sleep.... Oh how I love them. I spend too much time kissing their sleeping heads and staring at their angelic faces. I should be sleeping instead.
Anyhow, I sometimes feel guilty that my most peaceful and joyous parenting moments are while my children are completely unaware of me.