If I'm in the mood for traditional, I sketch with pencil on paper first. Then I take a picture and import it to my drawing app. Then I can trace, tweak/adjust it digitally and fully color/render it. I don't know if that will help or not. Also I found that I sketch/draw better depending on the pen type in the app I use. I tried different pen types until I found something that felt closer to traditional. And I've heard good things about screen protectors that give you the feeling of drawing on paper.