Good Old-Fashioned Pencilled Storyboards

Sorry I haven't posted in a while. Thought I might add some samples of my old storyboard work. I did these about 5-6 years ago, but I still kinda like them. Done the old-fashioned way with paper and pencil, but then later manipulated in Photoshop. I must say I still like the look of pencilled storyboards ( and so do a lot of directors ). I've planned on abandoning the pencil altogether in my work as it's much more convenient to just do it on the computer. My apartment is overflowing with old original pencil drawings, and packrat that I am, I just can't get myself to toss them. Keeping things in the digital world seems to be the best answer. I like the versatillity that I get doing boards in photshop, but when I look at these old-school boards I kind of long for the variation of gray and line thickness as well as the snap of the pencil stroke etc. So here's the question--anyone out there have any "recipes" for making computer art look and feel more like traditional pencil?