The ONLY stat that should ever matter to a Counter-strike player - Rounds Won %
Score/KDR/Headshot%/Points are all things that make you APPEAR better to others but not PLAY better. Those stats will improve with time but if you're focusing on those numbers when you're playing it negatively impacts your game. When people rejoin the server to get a fresh score you can tell they are too focused on how other players perceive them and they hardly ever end up a good player in the end... unless they read this =]