Digital is great -- for composition and color. But for line art? I don't think I can ever give up the fountain pen. This was drawn with a Sailor King of Pen (M) and Sailor 1911L (EF) fountain pens using Pilot Black ink. Yes, sacrilege. Pilot ink in a Sailor. But I have some Kiwa Guro arriving soon!
My favourite intergalactic hero (he still doesn't have a name) pulverizes the enemy. I used Uni-Pin and Artline ink pens and water-based Koi brush pens (light warm grey & dark warm grey & black).