Personally I like to listen to a band called Dethklok while I am on my barb, one of their new albums just hit the store shelf's today just picked it up now I have patch 1.05 to look forward too later while blasting there mind blowing songs.
When on my Wiz/WD I prefer techno beat goes along with the way I use my spells.
Monk/DH trance is good, goes with the flow.
Sometimes I will even go to youtube and listen to the full Diablo 2 soundtrack to replace D3 music.
So whats your farming music? Good luck to all on 1.05 and may the orange/green items start dropping!
I just did a quick seigebreaker run so far, listened to Simian Mobile Disco's new EP A Form of Change. I fuckin' love the direction these guys are going. Unpatterns is my album of the year so far.
(can't post links)
Usually I listen to various electronic subgenres, from EDM to chillout depending on my mood. Some of my friends are into making mixes so sometimes I'll load one up to listen to while I play. NIN also goes pretty well with the Diablo atmosphere, I've found.