Desktop. On the floor or on the desk?

I've noticed a lot of builds on pcpartpicker that people have put their computer on their desk. It takes up a lot of space and emits light in some cases. Why do people do this? I'm perfectly happy with my desktop beside the desk where it doesn't distract me with noise or light.
 

ismaeljrp

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Feb 8, 2012
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It's is because, Dust falls.. it really helps keeping dust in the pc to a minimum. That's really the only advantage, as well as buttons within better reach depending on the case, etc... but most of all cause of dust.