McKinney is on the north side of the Dallas Fort Worth Metroplex, more commonly known as DFW Metroplex. It’s farther north than other suburban cities like Plano or Frisco but not by much. All of DFW is easily accessible by car and there is a train but it doesn’t reach McKinney so not practical for commuting.
Many people think of DFW as a great big giant city (with 7.2 million people) with borders among the cities, suburbs and towns as largely irrelevant given the lack of natural borders from things like rivers or lakes. While there can be plenty of traffic in DFW for the most part the freeway system/turnpike gets everyone around in very short drives (or train rides) relative to most of the other large metroplexes. DFW is extremely new compared to the other big developed metroplexes and that means it is just more convenient. You’re 15-35 minutes into downtown Dallas or Fort Worth from a great majority of the suburbs which means if you choose to live that rolling lawn lifestyle it’s not far to hit the big cities. Most of the popular suburbs are directly north Dallas: Plano, McKinney, Frisco among others but there are also plenty in between the two cities: Irving, Arlington and Grand Prairie that draw a lot of attention as well.
If you’re looking for the most “developed” of the north suburbs in terms of a commercial district then Plano is a good option. Frisco is the fastest growing with the most development happening and McKinney as the farthest north tends to be a bit better on pricing. It also tends to be the most conservative if that is to your liking.
None of this means you have to live close to one of the big cities. The Metroplex is nearly 9,300 square miles, which means it is larger than the land areas of six U.S. states. If you want rural you can find it here.