Copic Multiliner SP (!!)
I don't know why it's taken so long for me to try Copic pens, but I am definitely so glad that I did! These pens are so nice, and the resulting line work looks amazing. I think it's partially the color--the black is truly jetblack. Another reason is the consistency of the ink that comes out. It's pretty inky and flowy, but dries very quickly, so you have the best of both worlds in terms of pigment-based ink (that's waterproof!). The finished pieces remind me of intaglio prints and etchings, which are printmaking forms that I absolutely love, mostly for its striking black and white qualities. On a side note, you can buy ink refills as well as replaceable nibs which is awesome! Contemplating getting the set of pens... or trying the markers next.