It's funny - because stockings are the source of a very prominent strain of fetishism, and particularly among so-called "transvestites" - but I tend to view them as an instant turn-off.
I am totally and absolutely a "leg man", but - and maybe this is in some way related to my interest in nudism - I find the bare leg (and, in the right circumstances, to a not inconsiderable extent, the bare foot) to be extremely sexy.
Stockings, as I see it, are a way for women to wear things like skirts that would normally show off the legs, but without actually baring the legs. Which, to me, is a travesty. Why would you cover up one of my favorite parts of a woman's body? It seems too much like censorship.
Fishnet stockings can be considered an exception, due to their highly porous nature. Thigh-high stockings may also be considered an exception when paired with a miniskirt, or worn with lingerie, since they draw emphasis to the exposed thigh. Still, they don't trump bare skin.
I know there are practical reasons for wearing stockings - like, for example, maybe it lets women wear skirts in cooler weather, or if they don't consider their legs to be of a sufficient quality to bear showing off (or if they just haven't bothered to shave their legs in the last couple days).
And that's fine. I'm not saying that stockings should be outlawed. But generally, I view them as a turn-off. Much like skorts (obviously dreamed up by a prude), which tease with the promise of a potential panty flash, without any of the risk of that actually occurring (and isn't that largely the fun of wearing short skirts?).
There are a lot of articles of clothing that I do find sexy - probably even to the point of fetishism - but they are almost without exception skimpy garments where the emphasis is on what they expose rather than what they cover up (e.g., short shorts, miniskirts, bikinis, flip flops).
Whatever exceptions there may be to this rule probably include uniforms of a certain sort (like cheerleader uniforms). Of course, I have an appreciation for things that are feminine and girly, like curves and flowy garments and sparkles, but I'm not sure I would class those as styles that I find particularly sexually appealing, so much as attractive on a different scale.
Here are some more fishnet body stocking pictures, for your enjoyment: