1. I don't like this dress/shirt. My aunt gave it to me. -- No choice but to keep it for keeping harmony in the family, like the mother-in-law giving a hideous present as a housewarming gift.
2. 自动 naturally. 船到碼头, 自然/动橫, when a ship approaches the pier, it will naturally/automatically becomes horizontal (docking in the same direction as the pier). So it means when things reach a certain stage, things will naturally become the way they are supposed to be/do. So in your sentence, the person will naturally appear in your living room at the appropriate time.
3. 好好的 = doing well. You are doing well in your job, why are you quitting then? 不做就不做了 = If I don't do it, then I won't do it. So the meaning is totally different.