fwiw, I grew up in Miami, and I 100% thought that me and my friends did not have an accent of any kind whatsoever ... because for whatever reason, there weren't really a lot of people born and raised in miami in popular media (at least that I was aware of, days before Pitbull, etc).

Well, I moved away to central florida (very different demographics) at 17 ... and it wasn't until a few years later when I went back to visit, that I realized just how distinct (to my ears at least) my friends sounded. Nowadays, I can hear someone start to speak, and within a few minutes of listening can tell that they were raised in Miami. It's a few subtle clues that thus far have almost always been right