Digital Performer 2.7, Reason 2.5, ReBirth 2.0, Emu Orbit V2, Novation BassStation Rack, Roland XP-10 (used as a MIDI controller, oh how I hate it!), Mac G4 466MHz (1.6GHz G4 upgrade card on the way). And occasionally my Ibanez RG250 guitar with Ibanez TubeKing distortion pedal and a Dean Markley amp I don't really care for.
On average, probably about 3 months. One month is flying for me, and I've got a couple that have been around for 2+ years that aren't done.
Mac OS9
Other than that...I'd not say tedious is the right word, but sometimes I spend so much time getting the right sound that by the time I've got the sound, I've forgotten the part I had in mind for it.
Kirk Hammett. I wanted to be a rock star.
I don't know. Perhaps the quirky, un-genred stuff I do on occasion. Whatever I'm writing at any given time is my favorite style at that time.