I have to be honest with you, RWIR. It's difficult for me to discern your enneagram, but I suppose I can hazard a guess based on some of your posts.
You come across as very reserved and cautious, and even when you participate in fluff-threads, your posts are very concrete and to the point. You seem most concerned with what you find intellectually stimulating and just like [MENTION=1669]Anita[/MENTION] in that respect, you're very investigative and fond of information. In fact, I find you two have a very similar "vibe" to one another, although you're less inclined to think aloud the way she does. I've always gotten the impression that even though you don't say much, you're constantly processing and analyzing and absorbing things. The expression "still waters run deep" definitely applies to you, I think.
In light of all this,
I would say that you're fairly balanced five; you don't seem to lean toward four or six wings. Then again, I only have so much information.
I hope you found this helpful