How deep does the rabbit hole go?

I find myself slipping more and more into extreme geekery.

This week I've:

started obsessing about getting myself a new mechanical pencil. Currently the front runners are a straight replacement of what I currently have or this. I'm thinking that the MUJI pencil is more practical, cheaper and I prefer it's clean design. I've had my current one for around 2 years at the moment and it's been perfect for notes and sketches
got really excited about a project here at work dealing with translating arbitrary input strings out into four distinct columns using a set of user defined rules. Taking a project from requirements all the way through design, feedback to implementation, testing and deployment is something I haven't done in a while and it makes a very nice break from maintenance work.
performed binary to digital conversion in my head for fun...

Image from : By John Tenniel (Alice in Wonderland) [Public domain], via Wikimedia Commons