I would be nice to be able to choose from multiple flag colours when flagging an email.
We work with several shared mailboxes, so more than 1 person has access. When replying on emails, only 1 person may do that (of course). We can see there has been responded (thanks to the icon on every mail), but maybe a mail needs more working (replies). In that case it would be helpful if a volunteer can mark an email as "his email" by flagging it with a certain colour.
An alternative is to be able to enter "flag categories", like the categories in the calendar and task modules. That way names can be entered as categories too.
Anyone else interested in this feature too?