In a slightly more helpful post, if you didn't get excited by driving the 350Z I suspect that it's not the car for you. Nothing wrong with that, but any debate over the merits of said Zed against an S2000 and a Z4 is going to be a bit pointless if you don't get excited by one.
In short, all great cars, but I'd pick the Zed over the others for the handling, the S2K over the others for the screaming engine, and the Z4 if I didn't want people to think I was a chav.