I’m doing my comics on classic A4 printed scrap paper. It saddens me having to throw so many papers. I work in finance, so a lot of wrong invoices or contracts on thick company paper, so the unprinted side is white, and thick enough.
I came across brush pen early, and loved it since, smooth lines. But depending on the mood I want for a given episode, I also use classic black gel pen (Mitsubishi being the best far above any other), thick whiteboard marker, Chinese ink (with stone, ink block, brush and all), cheap thin pen (first Effy épisode for example, to convey that angry mood), cigarettes butt (problem is that the brownish traces doesn’t age well on paper), dry coffee powder (like in episode 5 of Effy, about coffee)... I like experimenting. My only attempts at digital are using old paint software when I want neat unnaturally straight mood (using a ruler is too consuming).
I only do B&W, but in all fairness, if I had to color, I’d strongly consider learning and switching to digital.
But I’m probably too amateur or old school.
(Ironically, I spent last year deploying RPAs...)
Edit - a quick summary of my tools: