I worked at Hutchison Whampoa as an intern
Exposure to a variety of industries due to Hutchison's involvement in so many different fields. Can learn a lot over a brief period. Regular department outings (though brief ones). Most people were friendly to work with.
Different departments/subsidiaries generally kept to themselves, so there was not as much of a sense of a larger community despite being in the same building. Subcultures of the subsidiary companies made it feel as if they were from an entirely separate company.