For mine, I support my local team in Korea - usually watching match on TV or going to stadium which just 20 minutes by bus -and some other teams. I support or like some european clubs and NTs and one of them is Manchester United. I actually have the most interest in my local team, Korean NT and Man Utd. Oh, Korean people faced foreign football since 2000s. Before that, they watched via illegal ways or using Japanese TV. Anyway, our professional football started from 1980s and that time and before(It was kind of semi-pro league)many people were interested our national league(
National league is our second division name but no promotion
). In early 2000s, they faced Real Madrid, Juventus, Man Utd, 2 Milans etc. At that time as normally, people only knew about those big clubs. After 2002 WC (Some players transferred abroad), fans got many interest in smaller teams too. After the day of 2004, plenty of Man Utd fans created because Park joined Man Utd. Some of them didn't know what means united or even have no interest in fooball. I was fan little bit before that in 2003. It was started from silly impression, playing an arcade soccer and watched Beckham playing, just impressed me to become fan of Man Utd (Before that, I knew some teams but not actually liked them.).
Anyway, I'm sometimes frustrated lookig at some fans in my country. There are plenty of glory hunters and even many football fans claim that it isn't a problems. Also there are some minds that supporting not popular teams, praising newbies, underrating top players or keeping on the past of Leeds(This means that in my country, watching football for a long time could be a symbol of means you are intelligent. Haha very easy, isn't it?
It is so frequent that situation happens like this in private talk. "I was a fan of Newcastle, but they relegated and Citeh seems hopeful because of their new good players. I like Mark Hughes's leadership so I'll change my supporting team", "CR moved to Real Madrid, now I hate Man Utd because I supported Man Utd becaz of Ronaldo so I'll be the fan of Real Madrid, Liverpool or Chelsea next year" - I know that this happened a lot , "Gerrard is scum and arse. I hate Liverpool. I will support Everton or Man Utd."
Some fans become a fan of lower divison or remote team because they played well on fifa/pes or fm. That seems good.
Many fans from my country think our national league is garbage (Recently K-League is quite doing bad than 3 years before but still good) and sucks so they abandon to watch our league and only support teams in europe but they are eager to watch our NT games. Irony. Some even consider our NT garbage so they support other team when our NT met against others.For example, I still remember when Man Utd had a match between FC Seoul in 2007, and most of them were Koreans but Man Utd fans. Btw I was angry at some bastards made a flag that their staidum(In Korea)is another Old Trafford. Isn't an action of betraying?
Now those are getting much better than before. Fans are becoming awake and trying to know and understand other league teams like Celtic, PAO, Zenit, Galatasary etc.
I think not caring about their NT or their league and only interested in top leagues can make a total fail in their own football. They know a lot about european guys but they don't know who are playing in their club or NT(But some NT is possible to keep their ability when they have many players playing abroad and rely on them - This can make fun on football but finally without a good system of football association or well-working league, NT cannot stay well constantly like Malaysia, Singapore, Indonesia etc - Which did well before 1990s but after they watch European football, they addicted to European leagues and didn't care about their national football so it made them a total failure on their football.).