How about a Selected Opponents list which, for each of a player's opponents, would show the game types and the wins for each player? I know that played games will show this value, but it would be great to have these listed in one place so that a player can see how they are doing against their chosen rivals. Ideally the game type would be selectable as well.

I think it could be interesting to if such pages were publicly viewable from the person's Profile.