JIRA has a nice interface, but having to click, enter, save and then use "Back" to get to where I was before is a productivity inhibitor. Would like the option to update all information for an issue without clicking on a link. For example,

If I wish to change the Fix For and I have rights to do so, clicking on the link would display options to select a version. Selecting this would update the field either immediately or by hitting a "save" button.

I usually need to update the fix for and assigment options for every new issue.