@jerry505, so we can get some comparison...what are you used to driving?
I know that, coming from like the Lexus SC430, Infiniti G37, Acura, etc...I was surprised as the difference. I always thought that those kinds of cars were "sports cars", but they're "Sports Sedans" or, like
@gregd, mentioned, "sporty"...which isn't the same thing.
The Roadster is based on the Lotus Elise (especially the chassis and suspension), which is a hard-core, bare-bones SPORTS CAR. Handling is their #1 priority in the design. Driver comfort was a distant second (maybe even third).
Also, which Roadster did you drive? The 1.5s were, I think, a bit "truer"..with less sound deadening. So, they tend to sound louder, and "rattlier" than the 2.0/2/5 variants. But, even the 2.5s (which I have) aren't Lexus smooth and quiet. Also, the seats changed from the 1.5 to the 2.0/2.5 (some say for the better, others disagree)...and that's a factor in the seat-of-your-pants feeling over the bumpy bits.
However, that direct connection to the road is G-L-O-R-I-O-U-S when you push the car, hard, into the twisty bits. The steering is very direct, and extremely communicative.
You CAN use the Roadster as your daily-driver, commuter car, highway cruiser, but it's not really made for that. It'll do that, but other cars do that much better. It's a sports car and, as such, is most in its element when you "ride it hard and put it away wet".