Dust and the condition of the inside of your tower have much more to do with what kinda of a person YOU are rather than where there machine sits. I've had my tower on the floor for 6 years and on about 24/7 and it's rock solid. Every few months I blow the dust out but it's never THAT bad. Sitting on a carpeted floor under my desk.
Then again I've cleaned out friend's computers before and man...I feel for smokers. Opening up a smoker's machine is a disaster. Talk about dust and bunnies! I mean handfuls and wads of crap just sitting inside.
Basically, if you're a clean person, don't smoke around the machine, you can put it anywhere. All this talk about not putting it on the floor is nonsense.
Then again I've cleaned out friend's computers before and man...I feel for smokers. Opening up a smoker's machine is a disaster. Talk about dust and bunnies! I mean handfuls and wads of crap just sitting inside.
Basically, if you're a clean person, don't smoke around the machine, you can put it anywhere. All this talk about not putting it on the floor is nonsense.