That depends on your opinion. Some people like it one way, others like the other way.
For a very long time centrifugal superchargers were "all the rage". There were roots type superchargers available and some people did buy them, but it seems as most people bought the centrifugal type more often.
Now it seems like for the last few years ever since the '03 Cobra came out everyone wants a roots supercharger. The Roush, Saleen, and Shelby Cobra GT500 now all come with roots type superchargers.
Personally, i don't really have a preference one way or the other.