Although Im not too fussed about grades these days, as i have learnt that experience and knowledge/skill level is more important than rank, , I admittedly though enjoy the fact that there is a grade system in place in the places I train, as it gives me a structure for my training, as well as motivation and a sense of accomplish every time I graded and earnt a new grade. Saying this though, i have found many places where people cared more about how long left until they get their next grade and black belt than their actual training, and i myself fell into that influence for a VERY short period of time. I realised that this is damaging for martial arts to an extent, as people focus more on belt colours than the true meaning of martial arts. However, i still think its a good idea to have a common grade system; BUT ONLY so that it is easier to acknowledge a person's experience when going to train with other clubs/seminars for example. As long as the emphasis isnt on the grade, but ultimately on the person's experience, then all is fine, as I am fully aware that different clubs will definitely have different standards for grades, even for the same grade in the same style.