I have been using the journal that I made to make quick sketches & watercolours. I really love the way the pages are slightly different sizes & their softly torn edges.
I used a Berol water-soluble pen for sketching, this enables me to soften some of the lines later on using a brush & plain water.
The sketch below was also sketched using a water-soluble pen & then watercolour was added.
By the way, the reason the pages are different sizes is because I didn’t fold the paper very accurately – but, I think it gives my journal character!