A Painter 4 paint can is proudly on display here in my room. I'm somewhat invested in their product.
Now I'm using the (impossibly) smooth ink pen. If synthetic perfection ever starts boring me, I'll switch to GIMP. GIMP's pen tool has just the right amount of jitter by default. The line looks just like a line that I'd draw with a rapidograph pen on dead tree art paper. It's imperfect. Humanly erroneous.