I've driven or been in the following;
Audi TT - not as much of a pig in real life as in GT3, great little car, I was in the base model.
VW New Bettle - basically an Audi TT with a different body, drove about the same.
Subaru WRX - I own one, what more can I say, I prefer mine over the one in GT3, this is not the STI model.
Honda Civic - nothing special there, was a base model not some riced out one.
PT Cruiser - Cheese I know but a few freinds and I rented it at an airport because of it's cheese factor. It fit all our snowboards so that worked well. It wasn't as bad to drive as you would expect, worked well in the snow.
Porsche Boxster - only rode in it, it is what the RUF 3400s is based on. It's a Porsche, what more can I say. Doesn't get better than that.
Nissan Z - again nothing special there, I got to drive it, fun drive but I prefer my scoob
Mazda RX-8 - test drove one at a dealer, I'll stick to my scoob
Mazda Miata (forgot the exact model) - sweet little car, if I ever want a spider that would be it.
Honda s2000 - sat in it at a dealer, nice but I'd rather drive the miata
Acura RSX - a freind has one, she loves it though I don't find anything special about it when I drive it. You could do worst, but you could do ALOT better for the money.
Also where I live I have seen the lexus rs2000 (the alteeza one) lots of those, 1 RUF RGT (an actualy RUF, not a 911), a Aston-Martin vanquish (LOUD!), a few NSXs, I swear I was passed by a Pagani Zonda on the NJ Turnpike last summer. It was dark but the damn thing went by me like I was standing still (and I was doing about 80) and I did recognize the gatling (sp?) gun style exhaust in the center of the rear. There are also lots of 911s and boxsters in this area. I've stood next to an original GT40 (at the Indy museum) and next the panoz (at Limerock). Like everywhere we have BMWs, Mercs and Corvettes by the dozen here.