Purely anecdotal, but I seem to notice that the front side - back side thing is largley gender based. The women around here hang it backwards, feeding from the back. I will turn it around when I find it that way and invariably hang it to feed from the front. The "leave the last sheet on the roll and the fresh roll on the tank" trick is also gender-based. I (male) am under no circumstances to leave anyone "stranded" with only a couple of sheets on the roll; the converse is not true.
Russ