Yeah I am kinda leaning more in that direction I feel. With the tail, I think I can vary it between different characters, add some diversity to the species, just like you'd have different breeds of cats haha.
Oh I feel ya, there's something about the roughness of a sketch that always appeals to me as well. Something about seeing just a bit of the construction lines and the
simple values of black and white, just play nicely together.
I do think my actual finished drawing (none of the one I posted here are finished btw, all sketches) have an appealon their own. Funny you mentioned line weight, because that's something I noticed in my own work as well and a couple years back I develloped a line-art style that replicates, or at least closely emulates, that sketchy line wieght while also looking crips and clean.