Church Street I downgraded from tertiary to residential since it serves as a minor street in the grid rather than as a through street or collector road. As for its residential classification as opposed to unclassified, these two tags are nearly interchangeable and their usages vary by the user. Some my apply unclassified to a road that might possibly slot between a residential street and a collector road in the hierarchy, but some might also use it to slot below residential as a very minor service road-like street. It doesn't really matter too much which you use, though, because they both render the exact same as each other. I personally use unclassified for access streets on campuses, hospital grounds, airports, industrial areas, commercial areas, etc. or more-rural roads in agricultural areas, typically unpaved ones. All in all, it doesn't really matter which one you use.

As for driveways vs. parking aisles, these two also render the exact same here, but there might actually be some third party renderers that use that data more different than residential vs. unclassified. I tagged the access road to Wendy's as a driveway since it's not just a parking aisle, but also provides access to the drive through and the whole business itself. If this parcel of land right here was only a parking lot, I think parking aisle tags would make a lot more sense. Or, if there was a larger parking lot with separate aisles spurring off the driveway here, I would tag those as parking aisles.