Triple

In short, yes. As a dual (or more) national, whichever passport you enter a foreign country on, the country of that passport is the country that you will need to ask for help in an emergency. I don't believe the State Department offers any documentation on this issue, but it is the global operating standard. This isn't to say that the authorities of the country of your second, or third nationalities will never help you or recognize your plight, but they will typically point you to the nation of the passport upon which you entered for initial help.

BritInParis

Indeed. You can’t shop around for the best consular assistance. If you are a dual national and there’s no difference in visa requirements it’s worth checking out the consular assistance options for your destination when selecting which passport to travel on.

Triple

Some great answers here already. Coming into the US as a dual national I did not originally intend to become a US citizen as well. In fact, I said that I would only naturalize once I'd learn to enjoy the game of American Football. That never happened, but I naturalized anyway. The reasons were many, but included having kids and for security wanting to have the same nationalities as them, especially if something was to happen to my wife; getting fed up of being treated like a criminal, particularly when CBP introduced border control finger printing for green card holders; the ability to move abroad again without the complications of potentially losing PR status and having to obtain a marriage visa to come back; the fact that the US became my home; and lastly because a very wise friend once advised I do it sooner rather than later, in case something changes and the immigration system gets clogged - getting it becomes more difficult - or something more sinister. Little did we expect the political environment to change like it did. 7 years later, I have zero regrets.

And with my English accent still as strong as the day I got here, I do not feel less English. I still get asked about my origins on a daily basis.

Triple

And I'll add to that, that if you get into trouble as a dual national, legal or otherwise, in one of the countries of which you are a citizen, don't expect to get help from any other country of which you are also a citizen. It is unlikely you will.
travel.state.gov/content/travel/en/legal/travel-legal-considerations/Advice-about-Possible-Loss-of-US-Nationality-Dual-Nationality/Dual-Nationality.html

ddsrph

rpjs

Probably it would make no difference, no, but if it came up with any DoS representatives that I had two passports, I feel it would be slightly advantageous to be able to say I entered as an American.

We're also visiting the UK, Italy, Malta and France and obviously I will use my UK passport to enter those countries whilst it still gives me access to the EU passports line.

carcajou

It does not make any difference whatsoever.

GSH

I've been in the US since 1980 when I was nine. I'm an LPR with a Green Card. Never thought to become a citizen - being British why would you. At this point in my life I have no desire to become a citizen of the US. To stand and take an oath to this country, you've got to be kidding me. Not missing out on much - voting? What's the point. Nothing changes anyway. The politicians do what they want regardless. I'm only here because I work - if they kicked me out tomorrow I wouldn't cry. Sure it would be a bit of a hardship for a while but this isn't my country, England is. My parents went to Europe ten years ago for retirement. They couldn't have survived living here and having to pay rent. I wouldn't expect to retire here myself.

Nutmegger

If you only spent the first nine years of your life in the UK, you can't have much experience of what it is like to live there.

ddsrph

GSH

Absolutely true, but it also doesn't change the fact that I was born in England.

GSH

Try living in Southern California and being able to purchase a home.

Nutmegger

And why do you think that counts for so much when you have minimal experience of the country? Sounds like the folks who visit Disney and as a result want to move to FL.

ddsrph

NYer

This seems to be the average reason for British expats who post here: I'm here for the cash. Sad reason for leaving your own country and burdening this country with that bad attitude.