Well I voted Football, I don't isolate other sports.
However, I dislike the Barclaycard Premiership - I would rather watch players who have to earn their living, rather than those who could pack up after a match in the Prem (assuming they wouldn't live the lifestyle).
From the others Rugby Union, Rugby League (mainly for the tension of the Video Referee), Motorsports, I follow, but I'm less knowledgable in who the players are.
Basketball has been a passion with me as I have had an administrative role in a basketball club (Mansfield Express), since I was 13 years old, by far the youngest person on the Exec Committee ever!). It was a shame to leave the club in that role at the end of the past season. If I come back in an officiating sense then fair enough, but I anticipate I will become a major part of the new National League setup at University of Sheffield Arrows, should I get up there in September.