I agree with you about the fun in family life. Not all days are made equal and some days do not go well in the family. Sometimes there are bad moods early in the morning and it sets the day off in a poor way.
Sometimes it can continue until much later in the day. The kids come out of school and they are in a grumpy mood, things do not go well for me in the office and 2 of my best buddies are laid off which I feel upset about - then I wonder if I am the next one in line and worry sets in.
Life can be quite difficult with little or no family fun. It does brighten up a little when we all start playing around and laughter creeps in. Then life and family become one and the world suddenly seems alright!