Certain pleasures are more prone to hedonic adaptation. These pleasures can lift your mood quickly, but their effects can be short-lived. You may also get used to them fairly quickly. For example, If you have the same meal every day, you may find it to be less enjoyable by the end of the week. This is also true for fresh flowers or listening to your favorite song.
Gratifications, as well as activities that give a strong sense of meaning to us, are more immune to the effects of hedonic adaptation.