I follow sabermetrics and its children. I was really into Bill James back in the day and still had a subscription to BaseballProspectus.com (this post is half-drunk so excuse typos please). My 2 favorie sports are hockey and baseball. Baseball analytics made its biggest advances years ago - now it seems like they are just refining but hockey is in the initial stages. I've been into possession stats for hockey more than any baseball stats for the past couple of years although I still wander on to baseballprospectus and fangraphs and read some of the posts every 2 or 3 weeks.. I'm not a big hoops fan but I really like the advanced stats they have and footballoutsiders is great too although I havent really gone into depth there. I'm also interested in the performance stuff. I .listen to superhumanradio regularly. He has really good interviews with scientists on a regular basis.