Here's my hypothesis - every different amplifier/loudspeaker combination will respond differently. Hence, there is no one "perfect" loudspeaker cable for all systems. .
Some systems are more sensitive to cables than others - curiously in my experience the more "neutral" the system is the more you notice the cables. A friend of mine owns Quad electronics - Proac speakers system and the differences between cables in his system were very noticeable. Some people in this forum reported the opposite - when changing to systems with more "character" the differences between cables decreased. Systems optimized for spaciousness also are more revelatory of cables.
But most cable brands have a general specific taste, independently of the price range. A Nordost cable sounds incisive, on the border of fatiguing in some systems, with plenty of attack in the bass. A Transparent Audio cable will be fuller, with plenty of "soft" detail. Shunyata cables will have plenty of rhythm and enhance the performance, but do not sound as detailed or bass controlled as Kimber cables.
My experience was mainly with the upper range of these manufacturers, but these common traits propagate through their ranges. These common traits show, IMHO, that each cable manufacturer was pursuing a defined objective.
This post has now spoiled a possible WBF game - an interesting contribution would be if many people independently reported their opinions about cable brands without knowing of the others. If a systematic could be found we could be sure that we were really listening to something - or that we read the same leaflets!