You need to work on asymmetry and rhythm in your drawings - make the curves overlap each other so the drawings aren't so static and aren't like snowman people. You should really watch a tutorial on gesture (like Proko's one) to get these basics down. Here's an image from Michael Hampton's book, which you should also read, describing this better than I can - you should read this or like any other good figure drawing book to help with your drawings - books really helped me to not make the basic mistakes early on.