I consider life drawing to be the best discipline and training ground an artist can have.
I also love it, which helps!
The action of stilling your mind so that the heart and the head and the hand and the eye can communicate effectively, is very important - essential, in fact, to all an artist's other work.
In a way, I use drawing from life like a regular exercise class for that drawing machinery of heart/head/hands/eyes. The heart is the most important aspect, I'd say. You can't draw something that speaks unless your heart is involved.
I'm fortunate to have had a teacher who will not categorically tell you what to do, not ever. He says, if you don't like what I say, chuck it in the rubbish. What helpful advice, and I have indeed chucked some of his tips in the rubbish over the years, preferring my own way, which means that my drawing style has evolved freely and naturally, completely without strict rule or hectoring regulation, into a recognisable and strong expression of me.
The practice helps, for sure, but the freedom is the thing.
It's also good to have models who become part of the expression; bringing something of their own to the exercise. I love that, and I'm always delighted to find myself working with a model, rather than just from their physical form.
Every week, I take lots of materials - paint, inks, brushes. Most weeks, I end up just using pencils and charcoal, and the most important - an eraser. Not for erasing mistakes, for nothing is a mistake, but for subtracting marks in a positive manner. There's a massive, and liberating, difference!
Have you ever tried life drawing? I highly recommend it!