The McLaren F1 will always be one of my favorites. That could be because it was the pinnacle of performance when I was growing up, but I also love it because it's so analog compared to today's hypercars. And its naturally-aspirated V12 sings an angry song right up to the redline.
If you compare the BMW V12 to the twin-turbocharged hybrid V8 in its successor, the McLaren P1, it's a much more pure auditory experience. No whistling of turbines, no whine of electric motors. Just internal combustion.