Pro evo 2 was fantastic and probably the best experience, but talking about sheer fun, enjoyment, frustration and joy, then that must had been PES 5, so I voted that. I also think that version featured the best and most accurate player response to the controls. Wasn't easy to master, but it really added to the game when you could dribble past a couple of players with just the Dpad. I don't recall any previous (or successive) versions in which you could do that and it felt so natural YET it could not be blatantly exploited... as in 2008.