Some people prefer stand mounts, some prefer floorstanders.
Floorstanders are generally more efficient so don't always need as much power to drive them as standmounts, but because floorstanders produce deeper bass, more control is needed from the amplifier. This requires better quality amplification.
Soundwise, it's personal preference - some like low end they can feel, especially with music like Massive Attack, others find it a distraction. Sometimes, extra low end can overpower mid and higher frequencies, overshadowing mid/treble detail, which again, some don't like. A speaker with less bass doe tend to give you a greater insight into the music, allowing you to hear much more of what's going on - this can also produce a far greater three dimensional image than a floorstander.
I think our choices are mostly down to the tonal balance we prefer, but as different music is mastered differently, it's usually about compromising and choosing a speaker that sounds good with the styles of music we listen to.