The only team that gets me overly emotional good and bad is the Croatia national team so I'd say I'm more of an international soccer fan. I still get giddy over World Cups (despite FIFA's best efforts to ruin that) and Euros
Serie A was the first European league I was exposed to growing up in the NYC metro area they were actually on TV as early as the mid-90s on WNYE. I still like the league but must admit due to their lack of TV coverage in the US last decade I don't follow it as closely. Currently my two favorite leagues are EPL and Bundesliga. I keep an eye on the Championship as to me its one of the more competitive Euro leagues. With MLS, I go to a handful of games a year but I pretty much only follow my local team