The markets he's played in has to be the answer! We loved him when he was a Phillie (pre-Howard). He'd have gotten more attention if he was in Yankee pinstripes, for sure!!
Philadelphia and Chicago aren't big markets? (I'm skipping LA because he was a rent a bat pinch hitter at to help in the post season)
As I posted in the other thread, he was part of the crowd most of his career. When he was making frequent playoff appearances, he was in a lineup with Manny, Belle, Murray, Matt Williams, Justice, and guys like Sorrento, Sandy Alomar, and Baerga were also having pretty good seasons, after that, he couldn't get his teams to the playoffs, and as good as he was, he had 1 HR title, and led the league in SLG and OBP one time each. He is the 8th to 600, but 4 of the 7 others were his peers. He's played for 4 teams in the last 10 years, that doesn't help. His post season performances make ARod look solid.
He's a big hitter in an era of big hitters. When your peers are Ramirez, Ortiz, Griffey, Belle, Thomas, Sosa, Bonds, McGwire, Chipper, Piazza,Palmeiro, and later Miguel Cabrera, Pujols, Howard, Fielder, Braun, etc. you need to do something to stand out. He wasn't crazy like Manny or Belle, wasn't chasing season records like Sosa, Bonds, and McGwire, wasn't the gold glove winning, smiling, face of the game like Griffey, the biggest offensive force in the game like Thomas/Griffey, isn't the face of a franchise like Griffey, Chipper, Pujols, etc., isn't a triple crown threat like Cabrera, Pujols, etc.