building my house right in a corner of the town... :/
I feel this so much. My house is in the top right corner of town. Depending on the map, that may not be too bad, but where my house is left a very narrow gap to get down to the beach. I would move my house over a bit, or just completely move my house down closer to the middle of town where my secondary and tertiary characters are located.
I regret the location of some of the public works projects that I can't move like the campsite. It's not too bad so it's not something I can't live with, but I wish I had made it a bit further away from the central part of town. I like the idea of it being in its own private little section.
Speaking of immovable public works projects, I regret the police station I chose just a little bit. I love Copper, but I prefer the look of the old police station.
I kind of regret the name Roseton. There are so many towns with the name "Rose" in them. Now that I'm embracing my nerdy side more than I did when I was about 15 years old, I'd probably name my town something nerdier, like Dewford or something.
While there are some things I regret, I hate hacking; I don't even know how I would, so I can't really change it. But I'm super against any sort of cheating as it makes my game feel filthy or something. I've gotta learn to live with what I have and it's not something I would reset over.