When I first picked up ACNL (my first AC game), I got it second hand, so there was already a save file (Mayor Adama of Sylvari) on the game. And when I started, I selected 'new villager' rather than deleting the town that was already there, and played for an entire afternoon as a secondary character in Sylvari feeling that something wasn't quite right, but not knowing what, until I confirmed that you can actually name your town and you're the actual mayor, and I was able to reset everything.
I didn't know about what a 'good' town was, but I massively lucked out and my town is really, really great, and I've managed to keep Lolly (a starter villager) and Tammy (the first move-in) for over two years, despite going through periods of not playing it for ages.