Hope this doesn't get me kicked out as a "non-doodle" but have been having a lot of fun with this little project. Tools include cardboard, a sharpie and a knife. More to come!
I also like using just black ink. Lately, I've been using this Platinum Preppy extra fine for my doodling. I like how different kinds of pens and tools can sometimes give different art.
So, I really wasn't going to participate in inktober this year because of time constraints. But I saw some simple line art stuff from others that looked fun. I'll see how far I can make it this year.