I like labelling stuff. I didn't realise this was considered unusual, I label everything, otherwise how can I know what it is? Well maybe not everything, my kitchen and clothing cupboards are not labelled, though the baskets in the bottom of the wardrobe are.
My obsession with labelling came in handy when I moved. All the boxes were labelled with orange flourescent labels saying whats in them. Sadly I did not write - this one has the camera cable - on whichever one it is but hey ho.
My guests endlessly teased me when I labelled the sandwiches at my housewarming party, but hey no-one bit into a tuna sandwich thinking it was ham did they?
In the sewing room I label stuff. Burda Magazines, Knit fabrics, Scizzors, etc, mostly when stuff has gone away into drawers, boxes and magazine racks I find it helps to know what you have got.
Some of this is becuase I have quite a lot of stuff and try to keep it tidied away neatly (bwah hah hah).
My first proper IT job I was in charge of labelling the computers, printers, wall sockets and patch panels in the computer room (I fixed PCs, looked after the email and trained people too, but that didn't involve labelling). For this purpose I had a DYMO machine which printed out dinky little labels with which to label things. The DYMO belonged to the firm so I left it for my successor when I left.I miss the DYMO and it labelling officiousness. I think I might need to buy myself one....
not quite as essential as you know corkscrews or a kitchen timer (new recent purchases) but still it would make me VERY HAPPY!