Drawing practice

I've been experimenting with the drawing technique where the rules are- no looking at the paper and don't lift your pen until finished. This method, I'm advised, helps improve your drawing skills in general because you become much more aware of proportions and you're spending 100% of the time looking, so you really see what shapes/curves/angles/ are making up that object. I enjoy doing it because it's a challenge to yourself and I think the skewed finished results give the objects personality.. you can (almost) always tell exactly what they are too, despite the distorted broken lines. Kind of raises questions over how I perceive a 'good' drawer.