Those scrawlers or they call them meanstreaks, and those markers with the metal ball tip, think grog has one called the metalhead
With my oppinion, Tooli-Art 30 Acrylic Paint Pens writes smoothly on a variety of surfaces, very good to use.
Steel tip paint pens have a rough tip that won't break down as you scrape them over concrete or wood, making them amazing for rough surfaces. They present a thin line, and are often squeezable making them insanely easy to drip (in fact, it takes good marker control to not drip).