I realized though after reading descriptions of 6 just how much of a role questioning, self-doubt etc is playing in my life...There is no doubt that I second-guess everything, that I have a difficult time making decisions because I always wonder if it's the right decision, and that there are constant little voices in my head analyzing and re-analzying everything! It would explain why even when I've gone over a situation from every angle, and even discussed it with friends, it's so hard for me to consider a matter done and dusted. It can take years particularly if there is an element of unfinished business about it.
If I am a type 6 INFJ, no wonder I feel so exhausted and overwhelmed so much of the time. Constant questions, doubts, analysis, triggering one strong emotion after another, often in a never-ending loop...ouch.
This does give me good ideas for what I need to work on and how to do it, though.
EDIT: You know, though it's a bit surprising to me, I think I might just be 6w7 rather than 6w5. I am more inclined to look for optimism though I have a hard time finding it, and I have often trusted people too easily. My mum, who is probably INTJ, I think would be either 5w6 or 6w5. Maybe 6w5. She worries a lot, and she's more likely than me to find security in her intellect...
Still need to research all this more, though