I forgot to check whether the poll offered multiple options.
If I'm tracking, overdubbing, editing, or mixing in my own studio I use Digital Performer.
If I'm tracking in a commercial facility I use Pro Tools.
If I'm tracking in a remote location, I use Cubase LE4.
If I'm mixing in a commercial facility, I use whatever their DAW-du-jour is...provided it's an OTB job (preferably with an analog console).
If I'm mixing in a commercial facility and it's an ITB job, I use Digital Performer...or I decline the gig.
I won't even accept DAW editing work outside of my own facility. There are kids half my age who are twice as fast.