For Grassblades, I do my storyboards/scripts on regular printer paper, but everything else is 100% digital - a combination of Manga Studio 4 EX and Manga Studio 5, using my good old cintiq 21UX. MS4EX for digital roughs, panelling and dialogue, and then MS5 for all the cleanup, inking and colouring.
I could use MS5 for all of it, but I like using 4EX for its story-function (i.e: multiple-page files), and because I prefer the way its panelling and dialogue tools work. MS5 has them too, but they're set up a bit differently, and don't really feel right to me.
I do draw a lot of traditional stuff too - I did all of my inktober pictures with brush and ink on watercolour paper this year - but when it comes to comics, digital is just faster for me, since it streamlines a lot of the process.