I believe matchday II is the best.
Very good gameplay, i play it in <hard kicks> mode.Graphics are ok. Best is gameplay. Although it is someway slow, it can be very enjoyable. I beleive the best thing is the way the ball moves after the player hits it with the body (in the air). It is very realistic and you can make good headers after some practice.
Of course it is worth playing, i often play. What thing is better from the new football games is that in Matchday II you (and only you- not the computer or the quality of the player) define where the ball will go. It is not a matter of luck. When you make a good shot or header it will be in, or, otherwise, it will be your fault.
I believe it is the best game that could be made with 1 button only for shooting/passing (very clever designed on that matter)