I've had loads of questions about mine!
This week I came back to the car to see a 65(ish) year old lady looking at it. As I walk up to the car, they say "That's a beautiful car - I was just looking at the badge at the back to find out what it was." Her husband was also very interested in the car; even to the point of asking me how much it costs to run, as he would be tempted!
When I had my Astra VXR, my neighbours across the road and I used to say hello once in a while, but when the Z4 was parked on the driveway, the first thing they both said was "That's absolutely beautiful - It suits you and your partner well". Since I've lived here, I've had an Astra VXR, then a Mk2 MX5, then an Astra SRi Turbo, then another Astra VXR, then the Z4, and nothing has sparked more interest than the Z4! (Although my next door neighbour did say if he'd known I was selling my MX5, he'd have bought it!
When I very first got the car, I was just driving in traffic with the windows down, and a car pulled up next to me, wound the window down and the woman in the side said "I just wanted to say that is an absolutely beautiful car; and my husband thinks it's brilliant, too! - Do you want to swap?" - That was the first comment on my car, and I was dead chuffed with that! I never once got the same comment (understandbly) with the Astra VXR!
At work, it's definitely something of a talking point, too. My big boss said more than 2 words to me for the first time when I bought the Z4, and said she was impressed! (She has a Mk2 MX5)
There's been plenty of other comments from friends and strangers, and I really appreciate it. I like when people will openly come and speak to you about your car if they want to know more. I suppose it also helps that it's quite rare!
An absolutely fantastic car! I love it!