This morning I was thinking back to 1994 when I was about 16 and 3/4 to 17 years old and remembering attending a local funfair in our Castle Grounds with my brother, plus also attending theme parks like Alton Towers and (more locally to me) Drayton Manor, and thinking 'I don't get quite the same pleasure from this anymore that I used to get before, even just some 18 months earlier.
Ditto for visits to the seaside (for both holidays and singular day trips) and not forgetting Christmas.
I also recall around that same time (1994) buying a (late-model) Science Fair '60-In-One' electronics kit from Tandy/Radio Shack (remember those stores?) to replace an early 80s '50-In-One' set of which was no good any longer as many of its components no longer worked and some of its original supplied accessories had been lost over the years, and I also remember not getting quite the same sense of enjoyment out of it as I did from my previous one some 10 years earlier, even though it was basically the same, but with 10 extra wiring sequence projects, as instructed by the book supplied with the set.
Has anyone else by their late teens-early 20s, suddenly experienced a sudden lack of enjoyment of/enthusiasm for things they previously enjoyed during their childhood and/or earlier teenage years?
Also what's the phenomena called?