I've seen people make stickers, most notably Kaitty, for this thing called Telegram and they always look like fun.
I wanted to practice some simple expressions and thought it would be fun. It was fun. It appears you're supposed to draw full bodies and poses, but I just wanted to work on the expressions themselves. Had the file set up so I can easily mix and match mouths with eye shapes and other things so I may keep experimenting with expressions there.
Maybe I'll do more fully fleshed out ones in the future, but for now, I'm happy with this mixing and matching to dip my toe in. Plenty more were made, but I didn't feel like collecting them all together right now. Started at 12pm yesterday and finished at 5am. I'm very tired and will most likely pass out shortly before getting back to real work.