{s} hedonistic, inclined to indulge one's own desires and appetites, treating oneself to luxuries; characterized by self-indulgence
If you say that someone is self-indulgent, you mean that they allow themselves to have or do the things that they enjoy very much. To buy flowers for myself seems wildly self-indulgent. allowing yourself to have or do things that you enjoy but do not need, especially if you do this too often - used to show disapproval