as for my case,
i started as a Manchester United supporter when i was young
probably...they were the strongest team back then
either that they were the more popular club compared to others
well it was quite fun supporting them
till 1 fine day...i notice that EVERYONE was supporting the same team, to many people supporting the same team
everywhere you go..whether its mamak or friends/relatives/family
GO MU GO MU
it was then i decided to change,
and it was that day that the team
Arsenal defeated MU on some match..i wasnt quite sure
Anelka caught my attention along with Overmars n Bergkamp
it was then i became a Gooner before i notice it
and led the journey till now

it was the same for country supporting
changed from Brazil to France

it all went better when most of the France team were in the Arsenal squad
Henry-Pires-Viera era