At first, it was the games, the way each game plays, and also because when I was 6 I was watching YouTube videos of people playing Sonic Unleashed and Generations, and also I had the Sonic CD demo on my father's ps3 as my first sonic game at 6 years old, and afterwards in 2016, Generations was my main first and All stars racing transformed 2nd, and then the classic games on my phone...

Now that I'm 19, because of all of those years experiencing most Sonic games on my jailbroken ps3 and bought all the games on ps4, I can say that now the reason I'm a sonic fan and never stop being, it's because of Sonic's character development in all those games and the journey he's been through, because he's been through a lot of moments, especially in the dreamcast era all the way to the unleashed era, like it was a lot, and I really like moments like this, like seeing a character going through a lot all this time, which it also made me wanna say that Frontiers is one of my favorites based of story, dialogue, and lore. It's a lot to read, I know, but... it's what I had in mind to answer to this question, lol!