He's an afro-latono Spiderman, which resonates much better with a different demographic than Peter, and his movie was dope as ****.
That's why he's super popular.
Speaking a Black and Hispanic guy, I feel like Miles only got interesting during the Post-Bendis writing. Before, he was just Boneless Peter. I dunno, I always got annoyed when some people would act like I HAD to like a character because they have the same ethic background as me. So I guess I couldn't "resonate" with him, despite doing so with Spider-Man or Static, Cyborg and so on. Being a less interesting Peter was the same issue Ben Riley had.
That said, unlike Ben, I think they managed to figure out Miles as a character. He even gets a few villains of his own now (like that lady with the wings), kind of like Nightwing. Now if only he could get a proper hero name of his own(instead of the Flash like situation they got goin on now). And Kaine's a much more defined and interesting Scarlet Spider than Ben too.
Either way, I'm looking forward to the game myself. Insomniac have proven they can do a pretty good job with the first game. I wonder if the the "full sequel" will have Co-Op between the two or something?
I do like Miguel O'Hara a lot though. If we're talking Hispanic Spider-Man characters. And a 2099 game would be badass.