I have been using OneNote after going through a bunch of plaintext tools and I have never been at more ease with dumping info from my head for later retrieval. OneNote makes it as fluent as possible with as little resistance that no other tool offers.
New version of OneNote (metro style) has been bitten by designers though like all good things in recent times. Also, it does not have customizable shortcut keys making formatting code snippets a non-trivial process.
Every page is a white board which no other tool does and that's where it's power is. Plaintext can't beat that.
I love OneNote, it's my primary note taking tool, although I'm eagerly looking for a more open alternative.
I love pasting in screen clips and shots, and being able to extract text from them when I need to.
I also love arbitrary indentation and use that for structuring my notes. This is something that Markdown can't do, and I have yet to find any kind of markup-supporting text format that doesn't treat indented text as pre-formatted.
I dislike that newer versions force syncing with Office 365 and have reduced the file format flexibility of older versions, like saving the notebook on a network share, or exporting to an MHT file if one wants.
I still use the Office 2016 version and am hesitant to try newer versions again. I have numerous notebooks on many different PCs and want to coalesce them at some point, but am not comfortable putting them all on Office 365.
But for day to day note taking, it's the lowest friction tool I've found that comes closest to my preferences.
I've become a heavy user of OneNote recently as well, but I'm always in search of ways to improve my workflow. I have yet to fall into a consistent pattern of usage.
New version of OneNote (metro style) has been bitten by designers though like all good things in recent times. Also, it does not have customizable shortcut keys making formatting code snippets a non-trivial process.
Every page is a white board which no other tool does and that's where it's power is. Plaintext can't beat that.