[Grammar] would rather - had better

[Kotfor]

What is the difference between

1) I would rather go home now.
2) I had better go home now.

 

[emsr2d2]

1. I would prefer to go home now.
2. It would be a good idea if I went home now (rather than going home later OR rather than doing something else now).

 

[bhaisahab]

In 1) you would prefer to go home. In 2) there is some reason why you should go home.