Writing: My room. Sitting at a chair at my desk, with the fan on, drowning out outside noises. I need 0 distractions if I'm going to be productive while writing.
Storyboarding: Sometimes I'll go on the couch, can have some noise, but I still need mostly full concentration to translate my script to visuals.
Ink/paint/the rest: Anywhere pretty much. Still mostly my room or the couch, but I'll always have an audiobook/podcast/music playing. I've drawn at a cafe, my car, in waiting rooms. I need a little concentration for the inking phase, but after writing/storyboarding, the process is mostly mindless/I just need to do it.