I kept a diary but my mum used to snoop and read it, she even managed to open the diary that had a lock. I soon used her nosiness to my advantage and kept a fake diary, reliving my own version of events for the day - for example what a great day I had at school, the laugh I had at lunchtime, the 'A' I got in art, when in fact I had skipped school and spent the day down the park.
I wouldn't keep a diary now, i can''t imagine it would be of any interest to anyone now or in the future