I used to love teenage Peter Parker, but I find that most media aside from Spectacular and the Ultimate comics actually don't do it well. He's either in highschool too little, or he is instead treated like a little kid. Adult Peter just highlights the responsibility and stuggles of the everyman.

616 Teenager stories were his beginning, it was always a starting point that was unique for the time but the whole point of spiderman is his evolution and adulthood is where it's at, only time I liked a newer teenage Spidey was Ultimate, but that was a reimagining of the character so it makes sense

I mostly read him as a college student, 70s Spider Man is my Spider Man.

While there are definitely teenage Peters that I love (such as Ultimate and Spectacular), the peak age for Spider-Man is like the young adult years (as in TAS and the Raimi/Webb movies). IMO, what makes it the perfect age is the crossroads-y nature of it, as he could truly go one way or another.

Started reading superhero comics with JMS' Spider-Man, so adult Spider-Man is "my Spider-Man." Doesn't mean I dislike teenage Spider-Man and IMO it made sense for the MCU version to start with that.

In my opinion adulthood comes with more responsibility, and that's why it fits Peter, a hero all about responsibility better, also parenthood bring an extra level of responsibility too, that's why Peter should be an adult father