(someone) is eager to please
Sometimes a person really wants other people to like him or her. When people seem this way, you can call them "eager to please". "Eager to please" people do things like:
- smile constantly
- do whatever someone asks them to do
- agree with other people's opinions
Calling someone "eager to please" is positive in a way, but slightly insulting at the same time. It makes the person seem a little weak. A more positive description for someone who acts this way is "friendly" or "helpful".