I have the following problem, my memory is very bad and I tend to forget which posts I have read already and which I have not. Thus it would be very useful for me to see my unread messages. Another practical think would be the following. I might reply someones post or reply someones personal message and the same person will contact me in future, e.g. after 1 year. I will already forget his nickname. In that case it would be helpful if I can see the number of message we have exchanged.
I hope that the above features could be helpful also for others.