I'm another who dislikes the initials, although I have used them in the past. It can't be too hard to tap out granddaughter, grandson, niece, nephew, husband etc. It would make reading messages a lot easier, especially if you are like me and don't understand all the initials. There was a recent thread on mumsnet where the poster used YDD, EDD, etc. It made for very difficult reading.
What were the first ever records that you bought and when?
Parents-in-Law. What do/did you call them?