Would be cool to have aliases for branches.
The whole system builds up on branches names and you may refer to them from other programs, so you can't change the name.

Example: Branch with name 'Task0815' is a new feature called 'Branch aliases' (see what I did there? ;])

In the Branch Explorer this branch could be displayed as:
Task0815 | Branch aliases

This would enhance the overview inside the branch explorer, because having Task001 to Task999 isn't telling you much.

At the moment this would be inside an attribute or the branch description, but both aren't displayed until you click the branch.

I don't care if aliases are displayed in other views, but I think other users might want this, too ;)