The pink cloud is a our way of explaining the initial excitement and enthusiasm that any normal person feels for a new experience, e.g. the honeymoon period of a relationship, the thrill and awe of moving to a new city etc...obviously once the initial period of fascination wears off that is when the person will really find out how they feel about the person, place or thing...
In the case of sobriety just make sure you have worked the 12 steps and got your spiritual experience then when the initial 'pink cloud' starts to wain a new pink cloud will take its place and this is one that never need end...the growth of the new you on your new spiritual path...
Obviously after working the 12 steps and continuing to do so you will not be insane anymore so will be living life on lifes terms on your new pink cloud and not expecting a parade in your honour everyday you wake up sober:-)