For me it was the Runaways issue #2
This was my first comic book ever! Given to me by my cousin, he also gave me some of his extra trading cards...fell in love ever since!!!
... something is off with trying to insert images, so it was Uncanny X-Men #227...Storm front and center in her mohawk costume, but her hair was actually grown out. She became my favorite then and it carried over onto the animated series lol
Uncanny X-men #159 1982 (that makes me feel so young and vibrant LOL)
Oh man. I think the first comic I read came with a Cyclops action figure (1991):
—and was a reprint of X-Factor #1 or something.
Hmm. Nope, not this one. Must have been a later issue because Cyclops wasn't wearing yellow and I'm pretty sure Warren was Archangel at this point.
I'm sure the first comic of any kind that I read was some kind of Disney comic. I know I had a number of Uncle Scrooge-style comics, and I remember a Bambi one.
The first superhero comic I can remember though was either a Batman or Detective from the 70s or maybe very early 80s. I'd actually love to hear from any Batman fans who can figure out which one it is, I'd love to eventually hunt it down somewhere:
The cover was ripped off, and I remember the first page super-clearly: it was a splash page with a full-length Batman pointing a revolver straight out toward the reader. The artist was Jim Aparo or Aparo-like. The title was something like,"the first time Batman shot a man." Or maybe "killed a man." Which he actually didn't; the issue revolved around some kind of mobsters, and Batman has to pull some kind of trick where he fakes shooting someone. I remember some of it took place on a golf course; I believe that's where the man was "killed."
Anyway, I may not even have been the first superhero comic I read, but it was the first that really made me take notice of them and fascinated me with the art and story, enough to still (sort of) remember it today!