I agree that this would be an option that I would want but I would go one step further. The player has a different personality at home and in the car, I never turn mine off in the car but always when I have finished at home.

It is anoying when:

I plug it in at home after being in the car and it starts playing.
Put it in the car and it is off.

IMO, the unit should remember its last state on a particular power source and revert to it.

The empeg is fantasic in that it works differently at home rather than in the car and I think most people use a home and car player very diferently to one another. Therefore this should be one of the differences covered by the personalities.