Kraco said: No, it's not just you. I also prefer to do that for a very specific reason: It gets me involved in the work from an earlier stage. Of course even better would be to draw it from scratch (if I had the skills). That's why I also, in a twisted sense, like when there's something that needs fixing in the image: removing text, adding some clipped parts... That sort of things.
My question is how you fix something like removing text from something you are trying to render?