It has enriched, and in some cases made more concise, the language I use to represent people to myself. For example, instead of saying to myself "someone with such-and-such characteristics," I can just say "ENFp." I don't, however, believe that everyone or even most people function exactly like Socionics or the MBTI claim they do, so the usefulness of typology for me doesn't go far beyond what I just described. That and the absence of any major learning experiences in this area means my ability to understand people has remained at about the same level before and after my exposure to typology. If I had to assign a number to that level, it would be a rather low one. Other people are fundamentally mysterious.