When I teach workshops, I always warn my attendees to not get overly attached to specific art supplies, to just use what's at hand. Getting hung up on not having your special pencil only causes one more block between you and producing actual work.
In this, however, I am a bit of a hypocrite, because I'm really picky about some of my art supplies. Some things I don't care about all that much, like which fine line pens I use, but there are several other art supplies that I insist on using, after years and years of trial and error. These things I order by the boxload, so that if a manufacturer stops making the item I love, I'll have time to find a suitable replacement before I run out of supplies.
Which brings us to today's find: A large supply of the out-of-manufacture Staedtler Integrity 9505, which I found by the literal dozens on ebay. Free shipping means I bought 16 of them. Man, I love that pencil. Beautiful grip, nice weight, perfect eraser, no lead wobble. I am a happy camper.
So, readers. What're your must-have art supplies? Writing supplies? Coding supplies?