F30 feels like a mature persons sedan. That's my best way to describe it. If you got the 19" wheels and Dynamic Handling, be sure your first few drives are with the car in Sport/Sport+ mode. It helps the transition from a more "raw" BMW to a more "mature" feeling BMW.
After 500+ miles I feel pretty good about this car. When I want a performance sedan I click Sport+, but often I find myself in Comfort or Eco Pro mode. Pretty happy with 21MPG compared to the 17MPG I got in my 2010 335i.