Definitely EPL. In premier league any team can beat any other team on any given day. And there are many title contenders. Like @robwin said, last year Leicester City's championship run was historic. But same cannot be said about other leagues. In La Liga, its either Madrid or Barcelona (sometimes Athletico Madrid). Bayern and Dortmund in Bundesliga. Lets not even consider Ligue 1. PSG won last season by 31 points ahead of their second best team in the league. I don't really follow Serie A to be honest. IMO, EPL is the most exciting league of them all.