I first soloed in a glider at RAF Cosford in 75 we had tandem seating so I couldn't see my missing instructor, but it was quite the rush ! All I really remember was seeing an Avro Lincoln parked outside the hangar that belonged to the museum.
My first powered solo in a 150 in 76 was much like everyone else's experience.
I don't fly solo these days as usually I have a First Officer and another 170-230 people riding with me depending on which machine I'm on.