There is no limit to the wondrous nature of the Lego brick, as Ben Caulkins shows today: Behold, Master Chief's helmet made of Lego. It doesn't only look perfect, but you can actually wear it:
Is it against lego rules to use adhesive? Sometimes I see lego creations that look like they couldnt possibly be done with the way legos connect. Unless there are some extremely versatile legos out there I have not seen that allow you to build out in all directions and at odd angles.