I like mushrooms!

A variety of fungi has been mushrooming in supermarkets. I got some from a local grower, Mycofarm. Looked fresher than the imported ones. The Chinese shitake I've gotten in vacuum packs have a very strong chemical-like taste. I've been wondering if it's just the flavour perculiar to those mushrooms or if they have been processed. These ones were great! I love king oyster mushrooms!