I have very poor retrieval abilities unless I'm given some sort of clue. I just don't find it easy to pluck memories out of thin air (forgive the pun). I would blame middle age, but I've always been like that. So, I'm sure there are lots of earlier cloud experiences just waiting to spring out, but one memory takes me back to being in my late teens, on an outing with friends. We'd had a great summer's day on the hills in Northumberland, and spent the whole of the journey back spotting fantastical shapes in the clouds. A real high, without the drugs. True happiness.
Anita, North Cumbria, UK