It just would not be an entertainment forum without this thread!
For me it has been:
Kraftwerk (I have been trying to get a sound like theirs for my own band "Audiotronic" with my analog synths...it is really hard but fun)
New Order / Joy Division / Electronic / Monaco / Revenge / The Other Two (all these bands are made from former members of Joy Division)
And a bunch of others that I am to lazy to list right now...so what is everyone else listening too?