Stickers for holidays and celebrations

How do you use stickers? I have noticed that people use them in many different ways. Personally, I often put them on greeting cards, envelopes and packages - well, mostly because I'm lazy. I want to add that little extra to my gifts, without spending too much time and effort. Hearts are among my favorites, I would like the receiver to know that I think fondly of him or her. This is not only how I use stickers, but also how I create them. Most stickers are created with some kind of celebration in mind (Christmas, Valentine, birthdays...). The look of these stickers could be described as floral, ornamental, vintage, retro, fine art inspired... and feline (cats!).