pauloaguia: Now, what I'd really like to know would be the average BKR of the player that is ranked in ALL game types.

Ah, you mean the sum of a players BKRs of all the game types, divided by the number of game types? But we already have that. The statistics pages contains a list of players with their BKR sum. Just divide that by the number of games types available.

What I find strange about the average BKR is that it's possible to win five games, and then have your average BKR drop significantly: image the first 20 games you played of a particular game type, you played very bad. So your BKR is low, much lower than your average. But since you only played 20 games, the BKR doesn't count for the average. Now you win five games. Your BKR of that game type will somewhat rise, but it's still below your average. But now it will count in the average, so it will lower your average BKR.

I guess it's somewhat interesting to have a list of average BKRs of a players best N (for some value of N) BKRs. And it would also be interesting to see more than 50 people in the current lists, to see how far you're trailing. Then again, they are just numbers.