I like Big Machines. Giant, steel, complex, durable, powerful machines.
It's great when there is construction going on near a stoplight -- I'll sit there in my little truck and stare at the machines, only to pull ahead with a sigh when the light turns green again.
In a similar vein, I like working in metal. It's soothing (except when it's lacerating my fingers, or burning holes in my skin, or something). There's something to be said for projects where it's an appropriate response to BEAT IT WITH A HAMMER when something goes wrong.
Oh yeah.
In software development, my opportunities to hit things with hammers are severely limited.