That is an interesting point, because I am currently thinking of what club I should move to (in the top leagues) and having a favourite club in each country is sort of limiting.
In england - no liverpool, chelsea, arsenal, man city would only do Man Utd, Tottenham and Newcastle
In Spain - No real madrid, Valencia, Espanyol, Deportivo - only Barcelona
In Italy - No Milan, Fiorentian, Inter - only Juventus
In Germany - only Stuttgart
Right now I am holding out for Newcastle, but I do take into cosideration my favored team's rival and club I personally dislike.