I like finding that one I haven't seen before, or some hard to find items.
I enjoy seeing the changes (subtle and not) of say, each ratchet or wrench by the same mfr. over the years.
I like comparing tools made by any mfr. with those they made and rebadged for some other brand.
No real rhyme or reason to my hobby. No one in my personal life understands but they are generally impressed with my knowledge of tools.
Thanks to Papaw and others out there, there are a few places to meet up with other tool minded folks. It is nice to continue learning about everything, be able to ask questions, and be able to share these finds with others (WHO MIGHT CARE).
As mentioned, the thought of where/how the tool may have been used.
Keeping the old brand names and their history alive is important. Look at the effort Twertsy for one put into his site. Incredible, in such a short time too! Alloy Artifacts, Incredible. Not everyone, myself included,is able to focus on dates, places and such.
There is a lot worse that can be done with our spare time I suppose.
Not sure what the future will bring but for now the interest is still here with me and hopefully will be for many more years to come.