I have a personalized plate on my 3. My father customer made it to match the exact same paint of my 3 (Montego Blue). I know you'll probably won't noticet the color since I JUST took this picture in the garage of my job.
I had a cop pull me over once and asked me where my front plate is. I told him that it was a custom made plate by BMW. He looked at me, then walked to the front of my car, and then walked back to me and told me, "Nice Plate". No ticket...told me to stay out of trouble and just let me go.
Wierd.