I don't expect to eat anything else for the remainder of the day = You have made up your mind, and you expect you will not be hungry again today. I don't feel like eating anything else for the remainder of the day = This is based on your feeling. You feel full, maybe you feel ill from eating too much or you're simply not in the mood. I don't want to eat anything else for the remainder of the day = Another choice, you've had enough food for the day so you have decided not to eat any more.