Loopy if you suffer from psoriasis, you may be interested in the lovely Helen's blog here - she gives great advice on dressing with the condition.
I agree about the black trousers/skirt thing. It is rife in my work place. I try very hard to have a colourful work wardrobe, and I have quite a lot of printed/patterned pencil skirts. I do find dresses a little easier than separates though - no need to coordinate!