I agree on the E30. E30 >>> all other M3.
Oh yes, bolded for the fucking truth.
I'll never forget that one time in Paris a few years ago, probably around midnight. I was walking on the Boulevard Haussmann when I suddenly saw a yellow Carrera GT. It was parked and a guy (probably the owner) was on the phone not far from it. Of course, I inspected it as any car fan would have done and left, continuing down the boulevard. A couple of minute later I hear probably one of the greatest engine sound I've ever heard IRL. The guy was doing an acceleration on the boulevard and the buildings were amplifying the symphony. It was magnificent !
Needless to say that I had a huge grin of my face during those few seconds !