I've been a baseball fan all my life, and I'll continue to be. However, one huge difference between baseball now and when I was growing up in the '60s and '70s, is that baseball has not been the "national pastime" for many years. It's been football for some time now.
More than ever, baseball has become a business. Maybe this was inevitable, but with all of the cable TV and network TV money around, baseball long ago succumbed to the pressure to operate as a major corporation. It's not just a game and probably never was, but long gone are the days when a fan could easily develop a long-term loyalty to a team; unfortunately, with free agency and other means of player mobility, the traditional definition of "team" as we had known it, no longer exists. Club owners, looking for ways to win quickly, created and perpetuate this problem of paying unimaginable amounts of money to players, so we tend to root more generically, for the team on the field, rather than for specific players who embodied the team.
Baseball has also been highly overexposed. Most fans have cable and can watch not only their local team(s) but out-of-market games almost any time of the day or night. Also, NFL and NCAA football turn into sports-viewing competitors in the fall, just as baseball enters its post-season phase -- when fan interest usually peaks.
Sports seasons have overlapped for many years; it's a fact of the sports fan's life, and it has hurt baseball TV ratings. Soaring ticket prices have practically put an end to going to a ballgame as a family activity (unless one comes from a very rich family).
And there are the drug scandals -- steroids, Human Growth Hormone, and other performance-enhancing drugs have tainted all-time records (e.g., Barry Bonds' home run total) for many fans. However, asterisks and fan tantrums cannot erase on-field achievements.
For all these reasons, interest in baseball is nowhere near what it once was. And it will be up to a new commissioner to fix the problems, after King Bud I steps down following the 2014 season. All of this notwithstanding, I'm sure I'll watch at least some of the upcoming World Series games. Been doing it since I was a kid, and old habits are hard to break.