Okay, thanks for your feedback again, I tried to take all your advices (when they are good ) into account and here is what I achieved:
I tried to classify the position with 4 backgrounds: jade (the most eminent positions), gold, silver and bronze (for the 'common' citizens).
I don't know if it's a good idea, and I also don't know if my classification is correct, but I think it adds some in-depth in the ranking and make it more easy for the newcomers to measure the status (lol) of whom they are reading / replying to.
(+ it looks damn good )