Like what kind of an association? I am a member of the ADGA, and the reason why I do it personally is because I know the value of registered goats, and also being able to know and study their genetics, ancestors, offsping, etc. Also, since I am a member of the ADGA I can participate in DHI and Linear appraisal.
I'm a member of AGS and NDGA...they have SO much info on what a goat , mini or not, should look like as well as the breed standards. If I had the time and the courage I would enjoy being able to show my goats and be able to breed for the standard...which I would still like to do providing my funds pick up and debt goes down!