That'd be cool to make your own doll from scratch. I've tried making one before with Polymer Clay, but had no idea what-so-ever how to make one, so it ended up never working. Even though it looked nice, it just wasn't built how dolls are built. Either way, I enjoyed it. I just love sculpting/drawing humans, especially faces.
I also do like to sew, though I never have used patterns, and do it all by guesstimation. I'm still inexperienced at it. I sewed my first doll outfit a few months back, actually. I also did make the eyes. Of course I didn't make the boots. Also the shoulders are a bit stiff for moving the arms up. I did also buy the face, but painted it and cut the eye-holes out. It was meant to have bigger eyes, but I wanted it to be a bit lidded...
I do also have barbie-sized dolls, though they are technically Azone dolls. These are easier to sew for, since I can only sew by hand. I have only made a simple white coat, though, and it's not finished still. :x
I guess I am best suited to 3D dolls, though. My hands are just not stable enough for sculpting/sewing perfectly.