I have thought about becoming a Cambodian citizen and have rejected the idea for two reasons:
First, Bhavna's list of possible requirements to become a citizen fails to mention one that is truly spectacular in my book IF it is accurate. What's the cost? I have to say the following came from an expat so is COMPLETELY hearsay. He told me that an expat friend of his (in Kampot) looked into becoming a Cambodian citizen and was told (by "someone" in the government) that he was welcome to take Cambodian citizenship for $80,000 (US). Apparently his friend did just that because he was interested in doing significant business in Cambodia and becoming a full citizen would give him free reign to do business. He has NOT regretted his decision and has done "very well" in real estate development in a short time. I have no interest in doing business here so the COST, alone, put the kabash on the idea for me.
The second reason is more philosophical. I come from the USA which is frequently referred to as a "melting pot" of citizens who originally came from many countries and cultures to become ONE Citizenry. We refer to ourselves as "Americans" (which I disagree with since anyone from the OTHER 22 nations of North and South America ARE "Americans" too.........but it is the way it is.) It is true that, for the most part, ANY law abiding person who is allowed to immigrate to the USA, fulfills the requirements to become a citizen and takes the oath of allegiance to the Constitution of the USA WILL be considered an American by his/her fellow citizens. Now I can hear the jeers of some of you about MAJOR problems you have with that last sentence or two and I GET IT! I am ignoring the significant numbers of racist, xenophobic and bigoted people in the American citizenry BECAUSE I am making another point. Let me put it a different way. If I became a Cambodian citizen, doing WHATEVER it takes and lived in the country, learned to speak Khmer and developed many friendships, participated at my local Pagoda and was involved in my community for 30 years, I would ALWAYS be considered the "foreigner" who lives in that house down by the river.......or wherever by Khmer people. I don't believe I would EVER be considered a "Cambodian." On the other hand, if I was a Khmer person who moved to the USA and became a citizen of the USA, I would (generally) be considered an American citizen pretty much right away by MOST of my fellow citizens. Bottom line for me is, "Why would I want to become a citizen of a country (ANY) where I would not REALLY be considered a FULL member of the "Clan?"