Great post; glad to hear other people pick music to suit what their working on.  I've been doing a lot of horse tack lately and have been listening to Dave Stamey(thanks Bruce!), Ian Tyson and Chris Ledoux.  My wife hates it which makes it all the more enjoyable  J/K.  I listen to everything though.  I like Drowning Pool, Pantera, Godsmack, AC/DC, Metallica, and the like when I'm at work though.  If I get burnt out on Country I listen to a lot of Nickelback, Saliva, and modern type rock.  
Ryan