There are few experiences as transforming to a young mind than reading their first comic book. Whether you started with the big two, Archie, IDW, Dark Horse etc. Everyone remembers their first one. Or at least they remember the first one that made them start really getting into the medium and taking it seriously.
Conversely, there's nothing quite as guaranteed to make you reevaluate your entire personal identity than going back to something you love and finding the spark that it lit in you before is gone. You're older now, more experienced - what wowed you before just doesn't do it for you anymore.
Being a medium primarily made for children, comics are one of the most common examples of going back to something as an adult and not being able to love it quite as much anymore. But they're also the biggest source for going back to something you disregarded or even adored as a child and finding something magical you never knew was there before. Now the thing you loved before means even more to you.
There are tons of ways going back to re-read a comic as an adult can go for you. Not all of them good, but it's always worth doing...