From my perspective, there are a couple reasons why people might like stand mounted, instead of floor standing. The visual impact, as stated earlier, IS very important to most people. I bought Mirage OMD-28s because I love the sound AND the look of them. They are quite lovely...even thought they are big blocks. As an art lover I require beauty, as well as function. Luckily, I found that. But it IS important. I made special stands for my desktop speakers, which make the visual impact dramatic, as well as raising them off the desk.
Music is an art that we love...so it only makes sense that art lovers also tend to love visual art, and floor standing speakers aren't as visually interesting as stand mounted, with their differing shapes. For instance, this winter I'm going to build speaker stands for running 2 pair of Gallo A'Divas in tandem, and I am going to design/build a wood stand that looks similar to the Gradient Helsinki 1.5 speakers. Not because it will improve the sound in any way...but because it will look beautiful. Art matters.
From a technical perspective, I know many people that prefer the stand mounted speakers because they can relocate the bass to a location that better suits their room acoustics. This offers more flexibility in placement as the bass won't get out of hand if too close to a wall, etc. My Mirage's are very bass heavy, and my speaker placement isn't optimal close to walls....so I've had to send the low bass to subs that are placed more appropriately.
Anyways, just my 2 pesos. :-)
Mot