I'm probably weird for this but ... I very rarely replay choice games.  After beating Dragon Age, I had no inclination to go back and do it all again with a mage/dwarf/whatever.  Plus, I find that the current gaming trend of "you've got to make these terrible moral decisions!" really ruins the immersion for me, since I spent twenty minutes considering each decision, wondering what's the correct answer, what's the answer my character would choose, and inevitably Googling what all the options are.  I might as well just print out a walkthrough.

The option to explore everything, without having to replay, sounds like a dream.