My voice sounds different at different times.
This is how it sounds to me:
When I am feeling a bit self-conscious, it sounds low, strong, and confident. I know that sounds backward, but that it how it sounds.
When I am lecturing to my classes, I sometimes think I sound nasal, like a trumpet, or like one of the adults in the Peanuts TV shows–Wha whaaa wha whaaa wha whaa. I find myself wondering if they can stand to listen to me, but I guess they can, because they like my classes.
When I have to yell, I can be very loud without being sharp. I like that. In one of my jobs (whitewater raft guide), I have to yell alot to make myself heard above the noise of the river, and I have found that I really like to yell.
Normally, it is a medium pitch, a tiny bit nasal, and strong. It is not particularly smooth, but it is not weak or thin. Nobody ever comments on it, so I guess it is not really unusual. I do have a slight Long Island accent, that becomes stronger when I talk to someone else from Long Island.
And on tape, I sound like a complete idiot.
To use the food analogy that others have been using:
My voice is like pizza. Different flavors and textures all at once.
(My husband just read this and said that I got it right. Cool.)