I've owned/used a bunch of DAW's over the years (Digital Performer, Protools since v5, Ableton Live since v2, Tracktion, Studio One, Reaper, and prob a half dozen others I can't recall at the moment), but have mostly been a ProTools user.
Seems like everyone was jumping ship to Logic on macs a few years ago. I never really liked it. Performance was better than PT, but something about the workflow didn't click for me. I considered moving away from PT in the past year, but ProTools 9 has been excellent.
Avid seems to have drastically changed their thinking as far as listening/responding to their user base lately, and I have a feeling many good things are on tap.
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c