I tested Isaro watercolor (vertical stripes lower left), Kuratake Gansai (horizontal stripes) Van Gogh metallics (not shown) and Caran d’Ache cake gouache (yellow circle, orange swoop). They all performed well. Anything else you want me to try on this paper? I have the lower right side open.

Okay, from the top; Van Gogh metallic, very nice Fountain Pen ink (TWSBI Eco), slight tooth but wrote well Black paper: Sakura Gelly Roll looks FANTASTIC Colored Pencils (Derwent drawing) very nice laydown Kwikstix Tempera needed two layers for full coverage, which is typical

What about your writing inks?!?