I am a recovering serious person. I don't think I will ever totally break the habit but I am learning (little by little) that life should be fun and that I need to laugh much more!
Not just at myself but at life in general. I have had some lessons in that recently with a series of cosmic jokes. Situations that have helped me to see that I can either find the humor in it or let it ruin an otherwise delightful day.
I feel so much better when I can laugh instead of cry.