I find it frustrating as the designs and availability keep changing so often, so I tend to buy a pair, and then if I like them go back for more, before they go out of stock or change again.
In the UK I like "Pretty Polly" and "Boots" brands for everyday wear, but always look for a good waisband and fitting range as I am rather tall. Colour wise, I wear sheer "nude" with dresses (unless I have been on holiday and picke up a Tan) but, but tend to wear "barely black" with my suits.
Chrissty