I can't count the number of times that I've had to go through all of my sheets to review something in a project, only to be slowed down by having to churn through the Project Browser. Once my project is printed to a PDF browser, I can easily scroll through pages with PageUp / PageDown keys (and it feels intuitive to do so for anyone who grew up with Adobe/Office/anything-really), but it doesn't work in Revit - only the Project Browser lets me switch sheets in Revit itself.
It would be good if Revit let us use the PageUp / PageDown keys to switch through our sheets in the order that they appear in the Project Browser, or better, had page switching as a Keyboard Shortcut so we can do this and set whatever key we want to change sheets.