Pleasant Memories

I've got a project in English where I have to write a story preferably light and positive which I have no problem with however it made me reflect on past memories and how many of them were positive.  It's sad to say that I had to think for awhile to recall pleasant memories.  What does that say about my current thought patterns.  I don't know.  I like to think that I'm a relatively positive person.  Maybe it's because most of my thoughts are pleasant anyways and I don't really have to try to find positive thoughts, they're already there.  I don't know.  Anyways,  I think I'll tell a story about my children as I can always look to them for joy and amusement.