Is it possible to just not be a runner?
I just did the first day of C25K and it SUCKED!  In fact, that's a lie -- I didn't even DO the whole thing!!!  I couldn't!  cramp in my side, shortness of breath -- HURT to breath, etc etc.
All that being said -- I didn't start off as a couch potato!!!  In fact, I do at least 60 mins of zumba REGULARLY!  I sweat my arse off for nearly the whole thing (not during warm up -- but always START during warm up!)
I've never enjoyed running -- but always enjoyed dancing!  I'm sure that plays part of it...but...MY GOSH!!!!  I WANT to start running -- I enjoy the outside aspect of it -- would love to do some 5k's EVENTUALLY...but is it possible to just not be a runner?