It's important ...
but creative developments and promotions CAN overcome a typically lower-rated extension, IMHO. For instance, I go to
Whois.sc every single day (even now that their name has changed to a .COM) ... and along with .MOBI and .NAME, I would generally put .SC down at the bottom generally speaking IMHO. Time will tell which will be at the
very bottom, naturally!
This is a VERY BROAD subject matter ... perhaps best answered in its totality of opinions thoughout the history of threads on the site, in my view.

Hope that clarifies a bit.
-Jeff
