I really liked org-mode for a while. The key features for me were the plain-text nature of it and easy outline manipulation. That said, I got frustrated by how

I really liked org-mode for a while. The key features for me were the plain-text nature of it and easy outline manipulation. That said, I got frustrated by how little else interacted with org mode, and I eventually started keeping all my files in markdown... which gave me most of what I needed without requiring an emacs installation on every machine I work on (OSX, Linux, Windows, and Android).