I went solo in a microlight in 7 hours but I have an interesting tale about my lovely wife who went solo in a PA Warrior after something over 70 hours.
The instructors were sensible enough to realise that she was nervous so they skipped the solo bit and took her right up to cross country level before getting her to go solo.
She learned to fly to please me and I was very proud of her. It seemed a sensible thing to do at the time in case I was ever incapacitated when flying with her when she would be able to take control.
Unfortunately she never enjoyed flying but it was reassuring to know that she could, also understand everything I was talking about etc.