I'm not trying to be an artist. What I mean is I don't seek to sell anything, at least not at this time. I'm not trying to get any of my stuff into a museum either. I like the idea of urban sketching because it can be simple and loose or complex. It feels approachable. It's a good starting point for me.
There's one other thing. These are pricey, but you might want to try them at some point for markers. Crescent has a line of sketchbooks called RENDR and Canson has what they call the wall sketchbooks. The idea is that nothing bleeds or shows through to the opposite side of a sheet for either of these. RENDR is available on Amazon and other sites. The Wall I've only seen on Dick Blick's site. Just thought I'd drop that in. I've seen videos of both and they do live up to their claims.
I'm planning on getting The Wall sketchbook soon.