Only if you don't have cats. If you have cats, "under" is the only sane choice.

There must be a confounding variable: are you an engineer-type?

What traits are correlated with overing?

Do underers look at the world differently?

And it is a false dichotomy. Some people just don't care what direction when they replace the roll - what's a suitable name for that clade? And then there's the people who use the floor and ignore the holder.

Mine is in the under configuration, due to being near an AC vent that will sometimes unspool the whole roll in the over configuration.

Vertical seems to tear better.

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