I have bounced around the enneagram quite a lot and have no idea how to figure out what I am, and a friend of mine (who identifies as a counter-phobic 6) suggested that I'm a 6. Here are the descriptions from the Enneagram Institute that resonate
Excellent "troubleshooters," they foresee problems and foster cooperation, but can also become defensive, evasive, and anxiousBut I have never seen myself as pessimistic--though I can be anxious and defensive. I think that I'm pretty optimistic, usually, which the site says could be accounted for in integration to 9.They typically have problems with self-doubt and suspicion.
I don't identify very strongly with either a 5 or 7 wing. I guess I thought I was a 4w5 at one point, though.
Maybe someone knowledgeable could ask me some questions to help tease this out?