Not worried about belts - but ....
Like Bruce Lee said, i love belts, they great for holding your pants up. :D I took my green belt test last week and on leaving the Dojang, I told my Sahyun that it's not about the belt but the journey and he agreed. While I believe that with all my heart - a part of that journey (within the classes) is moving up in rank because in class rank determines what forms you do - what sparring you do, what level of kicks you work on. So while I agree that it's not about the belt - it depends on how your classes are setup and if the belt level keeps you at a beginners level of training you may want to work within the system.