I am going to do the survey in a minute, but I wanted to say that i agree with the suggestions made here re layers for temperature fluctuations and comfy/non-scratchy/no tags/natural fibers but not wool, etc.......I also know that I have to wash most clothes a few times before I can wear them because during the manufacturing process many use formaldehyde and that causes bad reactions..
..and shirts like sweatshirts that have a tighter fit on the wrist (or sports socks, like tube socks, that fit more snugly around the ankles, or tight turtle necks, etc) also drive me nuts....bras without lace, seams rt across the nipple, underwires, scratchy fasteners, irritating elastic, etc (trying to find comfy bras is the worst)
....and re the fit, I know that my weight has fluctuated a ton (and this may be just me, but bc of stomach issues and bloating, etc, I can literally go up two full sizes overnight, or down that much)....at this point I have clothes in sizes all the way from 0 to 12 (US sizing) bc of this issue, and that gets expensive and takes up a ton of space that my little apt does not have, so clothing that somehow accommodates weight fluctuations would be really wonderful
actually also re sizing, in the US at least sizes are not standard at all which means that buying clothes over the net is nearly impossible....a clear sizing chart or something like that would be very helpful, too
and easy care is also important (doing laundry is hard enough without having to do it by hand and dry cleaning is not an option bc of chemical sensitivities)
and of course, price and quality matter, too.......I am very broke but buying cheap clothes typically means they do not last and shopping is VERY difficult for me, so the less often I have to do it, the better
no zippers on the back, no really difficult to get on/off and/or fasten, etc
sorry if these are too many suggestions, but clothing has become quite an issue and I love that you are thinking about this, so I am mentioning everything I can think of