I'd love it if I was able to select multiple sheets in the Project Browser and open them at once. I'd be happy with a limit of 5 to 10 sheets. A previous suggestion had the comment of a warning if too many sheets were selected to open (I guess this would apply for selections with lots of 3D views etc) and also having a means to cancel the operation if it needed.
If you can spin this straw into gold, I will give you my first born male child.