I hated OneNote when I first saw it, then I started to use it and found that it had a lot of potential, particularly on a tablet pc (in 2005!).

I suffered with corruptions of the notes files, which were also VERY large, and then I changed to a standard laptop and found that it lost all of its charm without a pen.

I'd love to see what happens with it on the new Win8 tablets; hopefully it will get some metro/arm love.

All my notes live in dropbox-synced plain text files now.