I'd love a composite "player score" that ranks a player (ie userid) against all other players registered with AWS.
I'd compute the score by summing up the player's achievement medals, eg level 5 American Plane Operator etc. I'd probably ignore the negative ones, such as PR wreck etc, or maybe score them negatively. I'd weight the higher level awards higher, so a level 5 gets 10 points, a level 1 1 point etc.
In order to sift out retired players I would maybe ignore players who haven't logged in for more than six months..
The score could be displayed next to the player name when looking at the profile.
Simon