Master of the toepoke finish, and I know people go on about his hat trick against the mancs but the hat trick he scored for Barca against Valencia was just a phenomenal show of a player with both unbelievable speed and power, how he muscles through the 2 Valencia defenders is out of this world!
At his time there was a legion of great defenders that he came up against in La Liga and Serie A. The likes of Maldini, Desailly, Blanc, Cannavaro, Nesta, Ayala, Hierro, Montero et all, he put all of them on their arses.
His finishing is his weirdest attribute in my mind, he never connects with the ball properly it seems yet he always gets it past the keeper in this area that is too close for him to be able to save. It's simply perfect finishing, I guess that hat trick of penalties against Argentina just showed his amazing composure in front of goal.