I like to see and touch shiny metal objects.
I guess thats the "packrat principle" coming out in me
I like to set up and watch an automated or even semi-automated process running.
Machining in general encompasses such a variety of things to do and to master, that it is hard to get bored, and that is why I like it: the thirst for knowledge combined with a hands on approach to life.
Plus, it is a little bit of an adrenaline rush to watch powerful, fast moving machinery doing its job. Ya gotta have the balls for it, though.
Hmmph, wire erosion, no excitement there