INTJ according to that one site mentioned. The only thing I scored very strongly in though was the I with the NT & J being scored as 'moderate'. Some of the descriptive info on the wiki did suit me well.
One of the problems is that I answer the questions about social things based on my real life activities but I'm actually a bit more comfortable socially when not having to deal with people in person. I still prefer doing social activities online with people I 'know' and am familiar with but I don't have quite the problem with strangers online as I do in person. I also find it a lot easier to communicate in writing than to do it with speech. A big reason for this is that I can put my thoughts down and rearrange them and edit them before I present them to be read. I think my mind tries to do this with speech which causes me to leave awkward pauses or stutter a little while I try to 'edit' on the fly while my brain is already a sentence ahead of my mouth.
As for the traits that have to do with decision making, I think I actually use different methods and criteria depending on the type of decision to be made. Some decisions are best approached logically and others are best dealt with tempered by empathy and feeling. I do tend to think things through to the point of eternal procrastination but when circumstances demand action, I can take it. I like planned trips but road trips are best tackled loosely because it's sometimes nice to feel like you can take a side trip without having a pre-paid hotel room that you'll be charged for even if you don't get there in time to use it.
Anyways - My main is an enhance Shaman and has been since the LK expansion. Before that my main was a Warrior tank which I did enjoy playing but I didn't like the responsibility nor the obligation to keep tanking while everyone else was gearing up several dps alts. I think my reluctance to get my Warrior's tanking gear raid ready is to avoid getting stuck in the "tank or don't raid" rut that I felt I had fallen into before. I actually enjoy tanking but I enjoy my Shaman even more and right now I would still rather raid as dps than sideline my Shaman. As for healing, I don't feel that I'm good at it and I am a little afraid to try to get good at it for fear I won't be able to get dps spots that I enjoy more. I don't really raid on my alts though if I had the time I would love to get them geared up better and run heroics on them. Of course I also love playing lowbies and questing so I spend a lot of time on that too. I tend to feel more comfortable playing melee type classes and my Hunter rather than the casters. I have no idea if this is related to my personality type or just a result of my first character being a Warrior. Heh