When choosing clothes, here's what I look for:
1) Appearance, style, color. I'm first drawn to color, color is my thing. Style, not to conform to fashion but to conform to my taste and how I want to express myself. Color, lines, style, whether it says "me." Even stretch pants and t-shirts to wear around home need to be in colors I can live with. Also is it a style meant to be worn too snugly, or is it too revealing? I don't want either. I don't like clashy or too bright of colors - though I do wear them now and then, in the proper "flowery" mood. I mostly like muted herbals and earth tones. (There are some sensory issues right there.)
2) Fabric - fiber content. It has to be a type of fiber that I'm comfortable wearing, usually natural fibers that are cool, unless it's outerwear for winter. Also ease of care. I don't use dry cleaners if I can help it, and I avoid doing much ironing or hand washing. (Drip dry is okay.) NO POLYESTER near my skin - it makes me sweat and feel sticky. Sometimes a cotton blend is okay. (Definite sensory issues.)
3) Fit. Does it come in my size, or rather in a slightly looser size large enough for me to be comfortable in? (Again, sensory issues.)
Shoes again have to be comfortable, toes not too narrow, instep high enough to accommodate my high arches. Narrow enough at the heel so they don't slide around. No or very low heels. Even a purse needs to be a certain type, no clutches. I like a shoulder strap that's adjustable and not too narrow. Color, texture - very important.
I'm mildly AS, un/self-diagnosed.