@kleptomage
The point is to make the number stand out while not breaking the minimalist look of the buttons. Also, the number background is the same color as the whole button when moused-over.
@Barhandar
I’m aware. Only having the number in a box makes it look distinct from the notification bell, as if they are two icons with different functions. It doesn’t really matter. I’m just saying how I would do it.
@Background Pony #B643
The bottom ones look better to me as well. The no-rounded-corners style is rather constraining in this regard, I wouldn’t mind a complete redesign to be frank (more whitespace, less clutter, less borders, etc.)
@Luna
There’s always going to be someone upset about design changes. Just be patient and go through with it, Derpibooru could really use a better look.