I have to say the WWE games, particularly Smackdown!. Lost interest in the franchise when it came to the point of being nothing more than just another annually updated button-basher with improved graphics and less improved gameplay. The exception here was Smackdown! 2, which is still a good game upto this day. Regardless, the franchise really lacks substance when compared to Fire Pro Wrestling. I haven't played the last two Smackdown! games for the PS2 (i.e. Smackdown! vs. Raw 2004/2005), but from what I recall, I'm not missing much at all.