Firstly, people who study abroad could broaden their knowledge. They have huge opportunities to learn the language of the host country besides their studying. Also, some people from the country which the educational system is still developing could get better education by studying abroad. Secondly, foreign students could get a lot of experiences which they cannot gain without staying and studying abroad. They have chances to see not only local people/students, but also foreign students from foreign countries. Thirdly, they could learn how to deal with problem during staying abroad. It would be much challenging to try to resolve difficulties abroad than in their home countries.
On the other hand, overseas students get influenced negatively from the host culture. Students may feel isolated being far from their family and friends in their countries. Because of this feeling, some might lose their mental balance. Furthermore, they would adopt the habit and custom of the host culture. As a result, after coming back to their country, there might be difficulties in adopting the culture of their home countries again.
In conclusion, although there are several negative impacts on students who study abroad from host culture, not all students lose their mental balance and how their habit which they adopted is perceived may depend on the culture in their native country. Therefore, I believe positive impacts would exceed negative impacts.