Actually, what makes me question my type, was what I describe my greatest strength as. One of my greatest skills, is my ability to come into a room, and figure exactly what every one's mood is, what needs to be done, and keep track every thing....it's almost indepensable at work. Admittedly I've honed it. I read some that this is an ENFP trait....always being alert, and it comes easily to me. So do the trouble shooting parts and idea generation.
I'm fairly perceptive when it comes to other people but not so much when it comes to myself.
Marm, yes, I'm like you. I spend a lot of time by myself. An extraordinary amount of time actually. I like spending time with friends though, but I do need to recharge often. I'm not the best initiator though, and I get flustered with lots of people I don't know. I'm very awkward socially, until I'm comfortable, and comparing myself with ENFPs of my acquaintance they don't seem to have the same trouble. I do know I can talk my way into or out of things though, LOL.