People often avoid talking to strangers until they have been introduced, partly to avoid any possible embarrassment.
Individual ideas are encouraged. Arts and music are creative. British people are often not so good at working as a group.
People are quite modest. They do not like to complain directly: life is peaceful, but when there is poor service it is not challenged and changed.
The UK is where the English language developed. There are more people using English as their first language in the UK than in any other country except the US (the countries with the most English speakers are the US: 230 million, the UK: 60 million, Canada: 20 million, Australia: 15 million, Ireland/New Zealand/South Africa: 3 million). British English is easily understood in many parts of the world. Many people like British accents, although it can take some time for a foreigner to get used to some of the regional varieties.
It is easy to travel to the UK. There are flights to London from most parts of the world. You can travel around the UK by trains and bus, although the services are not very efficient. It is usually not necessary for a student to have a car. The country is quite small, so it is easy to make day-trips or to go on holiday to other parts of Britain. The UK is close to the many different countries of continental Europe. If you come to work or study in the UK, you may have the opportunity to experience a variety of different cultures of France, Belgium, the Netherlands, Scandinavia, Germany, Spain, Portugal and other countries.
If you are on a course for more than 6 months, you should be able to obtain free health treatment if you become ill. However, the public health service is not especially efficient, and there can be delays seeing a doctor or obtaining treatment (unless you are seriously ill).