Probably done 3-4000 or more trial flights, enjoyed everyone of them, well almost all!
One springs to mind, a chap was envolved in a near miss over Africa aboard airliner, shook him up, hadn't flown for 3-4 years, which was awkward because he worked for the UN.
Bought himself a trial lesson so that he could convince himself it was safe. Really enjoyed himself.
Came back 9 months later with a bottle of wine to say thank you as he done a few airline trips abroad.
This is just one example of what makes being a flying instructor so much fun.
I miss it.