It's nice to see the progression and date of high scores as you work your way to the top, but it's not fair to others trying to get a # placement if I have several high score slots all taken by myself. So that's why I usually delete mine, just because I thought only 1 per person was more fair to everyone.
So how about a feature to sort high scores 2 ways. The default would show one score per person, their highest score on that particular game would be used.
But then you could add an option to "show all scores" which would show more than one score per person per game, in order by score.