I ink almost exclusively with a crowquill (Hunt #102), usually with Higgins Black Magic ink. I'll fill larger areas with a brush or even a Sharpie, but I've found that for everything else a crowquill is the way to go.
Of course, there are always exceptions, aren't there? I have been known to use Micron pens on occaision, and even a brush once in a while (Windsor Newton series 7, #2 or #3).
I really ought to take this opportunity to thank the two guys who taught me to ink, David Gildersleeve and John Lowe. Both of them are fantastic; check them out at your first opportunity.
As with the Pencils section, I have kept stories together on the same line.