I'm not sure we have 8 national associations, more like two and a half. I have belonged to ASHI since 1997, I have seen many changes with some being good and some not so good. Kurt hit on the highpoint of ASHI. I will add that ASHI is the only HI organization that has a third party approved certification for its members. In other words, ASHI does not self certify that somebody is a home inspector. ASHI is run by a professional staff that is led by a former home inspector along with a volunteer board of directors. The other large organization is run by one individual. You just need to decide what you want.