I guess I did the right thing by never getting into a fourth, fifth, etc. sport and just limiting myself to three. Although my fantasy sports interest has waned a bit in recent years, I enjoy every minute of the NFL that I can catch. I don't watch full games of baseball much and only go to a few games a year but I certainly follow it regularly, often catching random bits of games, online highlights, and radio broadcasts in the car.
Now, my interest in college basketball is definitely down a bit in the past few seasons, and that's despite that fact that my team has won two of the last eight titles. I have never really enjoyed the NBA much at all and the one-and-done rule (as well as the college football-driven formation of silly, unwieldy megaconferences) just inject too much money into the system and NBA-ify the proceedings for me to enjoy the sport nearly as much as I used to. I still enjoy it, I just am not the ultrafan I once was. However, if they'd break up some of the big conferences (or play more intraconference games, getting back to true round robins or close) and either allow kids to go straight to the pros or adopt something like the baseball system (go straight from high school or you're ineligible for the pros for effectively three seasons), then my previous level of interest would probably return promptly.