I would like to suggest an update to Stack Exchange sites regarding the notification that is shown when a user earns a new badge.
Currently, all notifications are shown in the same color, like this:
This notification is great, but if you get more than one badge, it can be difficult to differentiate between those and "normal" messages.
I would like to propose this:
For each new badge a user earns, the background color should change based on the badge type. So for a gold badge, the background would be gold, etc...
Here's a quick look on how it would look like:
Now, if you earn more than one, it will look like this:
I think that this way it becomes much easier to distinguish all newly earned badges.