Yes, I am officially addicted - zentangles are just so much fun! This is a selection of recent ATCs I have made in the zentangle style. So far I haven't tried shading them - just black and white doodles, some with borders, some without.
My favourite pens at the moment are Faber Castell Drafting & Sketching Pens (Ecco-Pigment) - they are technical drawing pens and come in a pack of four with sizes ranging from 0.1 to 0.7. Absolutely wonderful!
What I think I like most is that you can just work on these ATCs in very small bursts of time - there is no excuse when you only have five minutes plus they are so transportable! All of these ones are on Strathmore Bristol Smooth ATCs.
Let me know if you love zentangling - perhaps we could trade???