All the veitnamese I have met are very highly educated with good manners but they are very serious people and probably that's why alot of people think they are full of themselves, personally I think they are down to earh people when you are having a serious conversation with them , good things about them that they dont look at your colour or ethnic group and they read alot , I have had many drinks with veitnamese in here and its so comfortable to be around them and it's do nice because the doctors who work in Royal free hospital is drinking with guys who work with me in the courier company.
What I like more about the veitnamese in london specifically that they all speak good English and they are very fast learners.
I mean comparing them to other communities like Koreans which there is a big community here as well , but unfortunately they are not as well educated as the veitnamese.