i've never been a fan of dual citizenship as i saw it akin to schizophrenia...
read an article on the subject...columnist isagani cruz from pdi made a very interesting analogy....

Dual citizenship usually creates dual allegiance, which our Constitution describes as "inimical to the national interest." A dual citizen is like a man with two wives, one he loves and the other he needs. Some occasions may occur when he will have to choose between sentiment and convenience.