Absolute favourites?
Featherweight black merino,zip neck, long sleeved "base layer" top. Comfortable from 25C down, non-stinky, dries overnight, and looks dressy. Supplex tshirts, tunics and leggings- non creasing, dries overnight even in the steamy north. Also work as exercise gear, night attire and base layers in the cold.
Nylon mesh tops - breathes well, dries in a flash, pretty prints, uncrushable.
Slinky - have various tops, black slacks, jacket. Uncrushable, non-sweaty, fast drying, comfortable and dressy.
Waterproof, packable jacket with matching zip-out fleece jacket - handles cold and/or wet.
Rayon sarong - it's a beach cover-up, skirt, sundress, sunhat, stole, beachblanket, tablecloth, towel, sun/insect protection...
Speedos - pack smaller, dry faster and everyone wears them.
Pashmina - elegance, warmth and compresses to nothing.