I am new to AS, and to this site. This section made me laugh - another thing I thought was only me! I can only wear natural fibres - wool and cotton mostly. NO polyester, or acrylic. Many people are weirded out by my ability to 'know' synthetic fabrics, by sight.
My particularities are as you mentioned - I despise all synthetics, tight things, especially pantyhose, turtlenecks, and undergarments w wire or lace (I still wear 'tween' style!), and thick elastic.
Also, like many of you mentioned, I have a lot of problems shopping, hate fashion trends, and find it hard to find confortable stand-bys, as things go in and out of style. Do any of you buy multiples of items? When I find something I like that fits reasonably well, I buy 2 or 4 of it, for some reason I cant buy odd numbers. If there is only 1, I cant buy it! I buy 2 of everything at least, including shoes! Is anyone else like this, too?