Until SP4, almost solely Pro Pack. Since SP4 (and SP4.1) I think I've opened Pro Pack twice. One of those was by mistake. I'll never go back, I love the Material room FAR too much now! And it's a stable as Pro Pack ever was (which means it DO crash occasionally but no more than Pro Pack did) WinXP Home. Would never go back from XP either. Win2KPro at work (but no Poser there), when I'm at work I miss my XP.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.