Pilot G-2 1.0mm Bold. A solid pen, available all over, and I like the Bold line over the fine line over the .7 mm Fine because it's a lot more reactive to the speed of your stroke. It's largely a holdover from when I used to sketch and write a lot more, but I like how you can have these thick luscious lines if you move slow that get razor thin if you whip the pen around. Not to say the Fine doesn't live up to its name, and it is a solid workhorse, but the 1.0mm Bold is my darling and I am forever enamored.
