Like pensieve and matt, I'm not opposed to the concept of uniforms; but as matt said, it's important that they're comfortable. I don't have any great sensory problems myself, but I can imagine how labels, frills, tight-fitting collars, and certain textures could be a source of great discomfort.
I've never worn a full-body uniform at any of my jobs- the thing that comes closest is wearing company t-shirts. I was always quite pleased wearing our cleaning compamny's t-shirt (it was comfortable enough), but I should probably also add that I liked it best when I was the first to be given a new design of our t-shirt, which I personally thought was more aesthetically pleasing because it had blue sections on the sides below the sleeves/armpits, while the old t-shirts were monochrome dark blue. So when it comes to the aesthetic side of it, I'm partial to companies that allow a LITTLE bit of leeway when it comes to personalizing the uniform a little.
At the factory where I used to work, we didn't have a single style uniform, rather we had different sets of clothing that were similar up to a point (all having the company's name/logo sewn onto it), but they came in a range of colours, usually blue, red, and grey. As I was more of a temporary worker there, I was never given the uniform or even just the shirts, but I would have liked if I had gotten the opportunity to wear one. So I was always working in casual dress. At one point, I wore one of my favourite red shirts, and one of my co-workers commented 'Oh, I really like this version of the uniform you're wearing', because she mis-took my shirt for one of the company shirts.
_________________
clarity of thought before rashness of action