Pro tools, because i bought it when the first mbox was the cheapest/best (
if you disagree please list what i should have bought in 2003 that came with good pre's and legal software) hardware/(legal) software option. Then i just stuck with it because i invested a decent amount of time learning it, and would rather make music than learn a new program. I've since bought a 002 (and wish it was
a fireface 800), because i needed more in's and some very small features it had (volume knob for speakers, speaker mute button...sounds silly i know), now i'm stuck. All my sessions from the last 4 years are in PT format, so i guess i'll keep my 002 and buy another interface and gradually start either converting everything...or just record from NOW on in cubase and if i want to work on older sessions use 002/pro tools.
Currently i'm thinking of making the switch it Cubase SX3 or Nuendo and trying to work out why i'd choose one over the other. Many people have told me they are practically the same, though Nuendo is just sx3 with video capability. An engineer i work with disagrees and says there are certain features within nuendo that make working with audio easier. I'm not sure what they are, as i foolishly didn't ask him to elaborate.
Anyways, i will switch because i want the midi functionality and scoring features of cubase. At the moment i use reason for all my midi editing and just rewire it and record the audio into pro tools.