Hand it level man...

One of the first questions many people ask is which is the best way to
hang the toilet paper; over the top or hanging from behind.  Each method has it's own merits, but I endorse the "from the front" method for a few reasons.  First of all, it is my experience that in
most restrooms it will always be setup this way. Since the majority of the populace actually practices this habit why stop. Secondly, if there is an international standard for paper hanging then we all know exactly where the first sheet is to be found and which direction to pull when you find yourself facing a new roll.