We have a lot of agents that work onsite and then go through a bunch of tickets at a time when they are in the office. Our previous ticketing system allowed us to choose what we wanted to do when the ticket closed. The options we miss are "close and next" instead of just closing the ticket it moves you to the next ticket in the list. "Close and stay" closed the ticket but allowed you to stay on the screen for re-assigning or adding additional notes.
It would be particularly cool if each user could pick a preference in their settings, but less important.
This type of feature drastically improves productivity because you are not sent back to the main ticket list every time you close a ticket. You can just go to the next one and keep working.

